diff --git a/context/CONTEXT_2026-02-13_docs-code-investigator.md b/context/CONTEXT_2026-02-13_docs-code-investigator.md
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@@ -0,0 +1,21 @@
+# Context for Documentation: js/ui/components/VideoModal.js
+
+- **Agent:** docs-code-investigator (daily scheduler)
+- **Date:** 2026-02-13
+- **Target File:** `js/ui/components/VideoModal.js`
+- **Line Count:** 6284 lines
+- **Reason for Selection:**
+  - Identified as one of the largest source files in the codebase (ranking #2 after `profileModalController.js`).
+  - No existing overview documentation found (`docs/VideoModal-overview.md` is missing).
+  - Contains critical UI logic for video playback, menu rendering, and interaction handling.
+  - High complexity with multiple imported controllers (`CommentsController`, `ReactionsController`, etc.).
+
+## Plan
+1. Analyze the file structure to understand the `VideoModal` class and its main execution flows.
+2. Create `docs/VideoModal-overview.md` to document the high-level architecture, public API, and key invariants.
+3. Add JSDoc to the exported `VideoModal` class and its primary methods (`constructor`, `open`, `close`).
+4. Add inline comments for complex logic blocks (e.g., rendering, data fetching).
+5. Verify changes with `npm run lint` and `npm run test:unit` (to ensure no regressions).
+
+## Goal
+Improve maintainability and developer understanding of this critical UI component by providing clear documentation and entry points.
diff --git a/docs/VideoModal-overview.md b/docs/VideoModal-overview.md
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+++ b/docs/VideoModal-overview.md
@@ -0,0 +1,82 @@
+# VideoModal Component Overview
+
+The `VideoModal` (`js/ui/components/VideoModal.js`) is the primary UI controller for the full-screen video playback experience in bitvid. It manages the modal lifecycle, orchestrates playback, and coordinates sub-controllers for social interactions (comments, reactions, moderation).
+
+## Core Responsibilities
+
+1.  **Lifecycle Management**: Handles lazy-loading of the modal HTML, DOM injection, and visibility toggling.
+2.  **Playback Orchestration**: Connects the video metadata to the underlying media player (via `mediaLoader` or direct video element manipulation).
+3.  **Social Coordination**: Instantiates and manages `CommentsController`, `ReactionsController`, `SimilarContentController`, and `ModerationController`.
+4.  **Accessibility**: Enforces focus trapping and ARIA attributes via `ModalAccessibility`.
+5.  **Global State Integration**: Updates the application's modal state (`setGlobalModalState`) to pause background feeds and handle back-button navigation.
+
+## Public API
+
+The `VideoModal` exposes a minimal public interface for the application orchestrator (`ModalManager` or `App`):
+
+| Method | Description |
+|--------|-------------|
+| `constructor(deps)` | Initializes the controller with dependencies (DOM, logger, state helpers). Does *not* touch the DOM. |
+| `async load()` | Fetches `components/video-modal.html`, injects it into the DOM, and hydrates references. Safe to call multiple times (idempotent). |
+| `open(video, options)` | Resets state, populates the modal with the given `video` object, and makes it visible. |
+| `close()` | Hides the modal, pauses playback, clears state, and returns focus to the trigger element. |
+
+### Dependencies
+The constructor requires a robust dependency injection object:
+- `document`: The DOM document.
+- `setGlobalModalState`: Function to notify the app of modal visibility changes.
+- `logger`: Logging utility.
+- `mediaLoader`: Service for handling media source resolution.
+- `assets`, `state`, `helpers`: Configuration objects.
+
+## internal Architecture
+
+### Lazy Loading & Hydration
+To improve initial page load performance, `VideoModal` does not render its markup until `load()` is called (typically on the first user interaction).
+1.  **Fetch**: Retrieves `components/video-modal.html`.
+2.  **Inject**: Appends the HTML to the `#modalContainer`.
+3.  **Hydrate**: Queries for all necessary DOM elements (buttons, containers, inputs) and binds event listeners.
+4.  **Sub-Controller Init**: Initializes `CommentsController`, `ReactionsController`, etc., passing them the fresh DOM references.
+
+### Sub-Controllers
+The `VideoModal` acts as a parent controller, delegating specific logic to specialized classes:
+- **`CommentsController`**: Manages the comment thread, composer, and fetching.
+- **`ReactionsController`**: Handles likes/dislikes and reaction counts.
+- **`SimilarContentController`**: Fetches and renders related videos.
+- **`ModerationController`**: Manages content warnings, blurring, and reporting flows.
+
+## Usage Example
+
+```javascript
+// Instantiation (usually in ModalManager)
+const videoModal = new VideoModal({
+  document: document,
+  setGlobalModalState: (key, active) => app.setModalState(key, active),
+  logger: logger,
+  mediaLoader: mediaLoader
+});
+
+// Initialization (lazy)
+await videoModal.load();
+
+// Opening
+const video = {
+  id: "...",
+  title: "My Video",
+  pubkey: "...",
+  // ... other metadata
+};
+videoModal.open(video, { triggerElement: clickedCard });
+```
+
+## Key Invariants
+
+1.  **Single Active Instance**: Only one video modal exists in the DOM at a time. Opening a new video replaces the content of the existing modal.
+2.  **Focus Management**: When open, the modal traps focus. When closed, it restores focus to the element that triggered it (via `options.triggerElement`).
+3.  **State Synchronization**: The `setGlobalModalState` callback MUST be called on open/close to ensure the back button works correctly and background videos pause.
+
+## When to Change
+
+- **Refactoring**: This file is extremely large (>6000 LOC). Consider extracting more logic into sub-controllers (e.g., a `MetadataController` for title/description/tags).
+- **Styling**: Changes to the modal layout should be mirrored in `components/video-modal.html` and tested for responsiveness.
+- **Playback Logic**: Changes to how videos load or play should likely be done in `mediaLoader` or `PlaybackService` rather than here, unless it's strictly UI-related (e.g., custom controls).
diff --git a/docs/agents/task-logs/daily/2026-02-13_15-46-50_docs-code-investigator_completed.md b/docs/agents/task-logs/daily/2026-02-13_15-46-50_docs-code-investigator_completed.md
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@@ -0,0 +1,8 @@
+# Agent Task Log Entry
+
+- **Date:** 2026-02-13
+- **Agent:** docs-code-investigator
+- **Prompt:** bitvid-docs-code-investigator.md
+- **Status:** completed
+- **Branch:** ai/doc-video-modal-20260213
+- **Summary:** Documented `js/ui/components/VideoModal.js` with JSDoc and `docs/VideoModal-overview.md`.
diff --git a/docs/agents/task-logs/daily/2026-02-13_15-48-00_docs-code-investigator_started.md b/docs/agents/task-logs/daily/2026-02-13_15-48-00_docs-code-investigator_started.md
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+++ b/docs/agents/task-logs/daily/2026-02-13_15-48-00_docs-code-investigator_started.md
@@ -0,0 +1,8 @@
+# Agent Task Log Entry
+
+- **Date:** 2026-02-13
+- **Agent:** docs-code-investigator
+- **Prompt:** bitvid-docs-code-investigator.md
+- **Status:** started
+- **Branch:** ai/doc-video-modal-20260213
+- **Summary:** Task claimed — execution beginning
diff --git a/js/ui/components/VideoModal.js b/js/ui/components/VideoModal.js
index 1cd9f598..96b2e261 100644
--- a/js/ui/components/VideoModal.js
+++ b/js/ui/components/VideoModal.js
@@ -52,7 +52,29 @@ import { UI_FEEDBACK_DELAY_MS } from "../../constants.js";
 
 const SIMILAR_CONTENT_LIMIT = 10;
 
+/**
+ * Main UI controller for the full-screen video playback modal.
+ * Manages the modal lifecycle (load, open, close), orchestrates playback,
+ * and coordinates sub-controllers for comments, reactions, and moderation.
+ *
+ * @see {@link docs/VideoModal-overview.md} for architectural details.
+ */
 export class VideoModal {
+  /**
+   * Initializes the video modal controller.
+   * Note: Does not touch the DOM or load HTML until `load()` is called.
+   *
+   * @param {Object} options - Configuration options
+   * @param {Function} [options.removeTrackingScripts] - Helper to sanitize HTML
+   * @param {Function} options.setGlobalModalState - Callback to update app-wide modal state
+   * @param {Document} options.document - The document instance (for DOM access)
+   * @param {Object} [options.logger] - Logger instance (defaults to devLogger)
+   * @param {Object} [options.mediaLoader] - Service for media resolution
+   * @param {Object} [options.assets] - Asset configuration (e.g., fallback thumbnails)
+   * @param {Object} [options.state] - Initial state (e.g., thumbnail cache)
+   * @param {Object} [options.helpers] - Utility helpers (e.g., npub encoding)
+   * @throws {Error} If document or setGlobalModalState is missing
+   */
   constructor({
     removeTrackingScripts,
     setGlobalModalState,
@@ -475,6 +497,13 @@ export class VideoModal {
     return this.modalVideo;
   }
 
+  /**
+   * Lazy-loads the video modal HTML and injects it into the DOM.
+   * Ensures idempotency: if already loaded and connected, returns immediately.
+   *
+   * @returns {Promise<HTMLElement>} The root element of the video modal
+   * @throws {Error} If fetching the template fails or container is missing
+   */
   async load() {
     if (this.loaded) {
       const root = this.playerModal;
@@ -546,12 +575,20 @@ export class VideoModal {
     return this.playerModal;
   }
 
+  /**
+   * Binds the controller to the DOM elements within the modal.
+   * Initializes sub-controllers and sets up event listeners.
+   *
+   * @param {HTMLElement} playerModal - The root modal element
+   */
   hydrate(playerModal) {
+    // 1. Cleanup existing accessibility traps and sub-controllers
     if (this.modalAccessibility?.destroy) {
       this.modalAccessibility.destroy();
     }
     this.modalAccessibility = null;
 
+    // 2. Cleanup existing popovers (Zap, More Menu)
     if (this.modalZapPopover?.destroy) {
       this.modalZapPopover.destroy();
     }
@@ -3021,6 +3058,14 @@ export class VideoModal {
     });
   }
 
+  /**
+   * Resets the modal state, populates it with the provided video data, and makes it visible.
+   * Also initializes moderation, comments, and accessibility traps.
+   *
+   * @param {Object} video - The video object to display (title, description, tags, etc.)
+   * @param {Object} [options] - Display options
+   * @param {HTMLElement} [options.triggerElement] - The element that triggered the modal (for focus restoration)
+   */
   open(video, options = {}) {
     this.activeVideo = video || null;
     this.moderationBadgeId = "";
@@ -3069,6 +3114,10 @@ export class VideoModal {
     this.refreshActiveVideoModeration({ video: this.activeVideo });
   }
 
+  /**
+   * Closes the modal, pauses playback, clears active state, and restores focus.
+   * This is the primary cleanup method when dismissing the modal.
+   */
   close() {
     this.activeVideo = null;
     this.applyModerationOverlay(null);