docs: update upload guides with exact file types, limits, and CORS requirements

- Updates `content/docs/guides/upload-content.md` to list supported video formats (`.mp4`, `.webm`, `.mov`, `.mkv`, `.ts`, `.m3u8`, `.mpg`, `.mpeg`) and thumbnail formats.
- Adds a recommended file size limit of 2GB with an explanation (browser memory constraints).
- Clarifies CORS configuration for Cloudflare R2 to explicitly require AWS SDK v3 headers.
- Updates `content/docs/getting-started.md` to distinguish between direct upload formats and external hosting formats.
- Adds metadata validation details (Title required).

Co-authored-by: PR0M3TH3AN <[email protected]>

content/docs/getting-started.md

@@ -22,7 +22,7 @@ Ready to jump in? Here's everything you need to know to start watching and shari
 
 ### Step 2: Prepare Your Video
 
-1. Host your video at an HTTPS URL that browsers can stream directly (MP4/WebM/HLS/DASH all work). You can use your own CDN, Cloudflare Stream, an R2 bucket, or any static site host—as long as the link begins with `https://`.
+1. Host your video at an HTTPS URL that browsers can stream directly. If you are uploading a file directly via bitvid, we accept **MP4, WebM, MOV, MKV, TS, M3U8, MPG, and MPEG**. For external hosting, ensure the format is streamable (MP4/WebM/HLS/DASH). You can use your own CDN, Cloudflare Stream, an R2 bucket, or any static site host—as long as the link begins with `https://`.
 2. (Optional but recommended) Generate a WebTorrent magnet so viewers can fall back to peer-to-peer delivery. Desktop apps like [WebTorrent Desktop](https://webtorrent.io/desktop/) or command-line tools can create the magnet for you.
 3. Double-check that either the hosted URL or the magnet (or both) is ready before you open the Upload modal.
 

content/docs/guides/upload-content.md

@@ -7,6 +7,22 @@ bitvid is a decentralized platform, but for larger video files, we currently sup
 - A **Cloudflare Account** (free to create).
 - An activated **R2 Plan** (there is a generous free tier, but you may need to add a payment method).
 
+## Supported Media & Limits
+
+Before you start, ensure your content meets the following requirements:
+
+### Accepted File Types
+- **Video:** `.mp4`, `.webm`, `.mov`, `.mkv`, `.ts`, `.m3u8`, `.mpg`, `.mpeg`
+- **Thumbnail:** Any standard image format (`image/*`)
+
+### File Size
+- **Recommended:** Up to **2GB** per file.
+- **Why?** Browser-based uploads rely on your device's memory for hashing and chunk management. Files larger than 2GB may cause browser instability or crashes.
+
+### Metadata
+- **Title:** Required.
+- **Description, Thumbnail, Tags:** Optional but highly recommended for discoverability.
+
 ## Step-by-Step Guide
 
 ### 1. Create a Bucket & Enable Public Access
@@ -25,7 +41,7 @@ To allow your browser to upload files directly to Cloudflare, you must allow Cro
 
 1. Still in your bucket's **Settings** tab, scroll down to **"CORS Policy"**.
 2. Click **"Add CORS Policy"** (or Edit).
-3. **Important:** Browser uploads use the AWS JavaScript SDK, which sends the `amz-sdk-invocation-id`, `amz-sdk-request`, and `x-amz-user-agent` headers. The simplest working setup is to allow all headers by setting `AllowedHeaders: ["*"]`.
+3. **Important:** Browser uploads use the **AWS JavaScript SDK v3**, which automatically adds headers like `amz-sdk-invocation-id`, `amz-sdk-request`, and `x-amz-user-agent`. You **must** allow these headers. The simplest and most robust setup is to set `AllowedHeaders: ["*"]`.
 4. Paste the following JSON configuration and **explicitly list every allowed app origin** (the scheme, host, and port must match exactly):
 
 ```json
@@ -39,7 +55,7 @@ To allow your browser to upload files directly to Cloudflare, you must allow Cro
   }
 ]
 ```
-> **Note:** Replace the `AllowedOrigins` values with the exact origins you use in development and production (the scheme and port must match exactly). Uploads go through the **S3 API endpoint** (`<account>.r2.cloudflarestorage.com`), and browser-based uploads require `OPTIONS` for preflight requests.
+> **Note:** Replace the `AllowedOrigins` values with the exact origins you use in development and production. Uploads go through the **S3 API endpoint** (`<account>.r2.cloudflarestorage.com`), and browser-based uploads require `OPTIONS` for preflight requests. The `ExposeHeaders` list ensures the SDK can correctly track multipart upload progress.
 
 5. Click **"Save"**.