BotGPT:

“When dealing with video playback on iOS devices, especially when using third-party video storage servers, it's important to ensure that the server's response headers are properly configured to support smooth streaming and playback. Here are some key HTTP headers and their ranges that you should consider:

1. **Content-Type**: This header indicates the media type of the resource. For video files, common types include:
   - `video/mp4` for MP4 files
   - `video/quicktime` for MOV files
   - `video/x-ms-wmv` for WMV files
   - `video/webm` for WebM files

2. **Accept-Ranges**: This header should be set to `bytes` to indicate that the server supports range requests. This is crucial for seeking within the video.
   - Example: `Accept-Ranges: bytes`

3. **Content-Length**: This header specifies the total size of the video file in bytes. It is important for the client to know the size of the file for buffering and playback.
   - Example: `Content-Length: 12345678`

4. **Content-Range**: This header is used in response to a range request. It indicates the range of bytes being sent in the response and the total size of the file.
   - Example: `Content-Range: bytes 0-999/12345678`

5. **Cache-Control**: This header can be used to control caching behavior. For video content, you might want to set it to prevent caching or allow it based on your needs.
   - Example: `Cache-Control: no-cache` or `Cache-Control: public, max-age=3600`

6. **Expires**: This header can be used to specify when the content should be considered stale. It can be set to a future date to allow caching.
   - Example: `Expires: Wed, 21 Oct 2025 07:28:00 GMT`

7. **Cross-Origin Resource Sharing (CORS)**: If your video is hosted on a different domain, you may need to set CORS headers to allow access from your iOS app.
   - Example: `Access-Control-Allow-Origin: *`

8. **Content-Disposition**: This header can be used to suggest how the content should be handled (inline or as an attachment).
   - Example: `Content-Disposition: inline; filename="video.mp4"`

### Example of a Response Header for Video Playback

Here’s an example of what the response headers might look like for a video file:

```
HTTP/1.1 206 Partial Content
Content-Type: video/mp4
Accept-Ranges: bytes
Content-Range: bytes 0-999/12345678
Content-Length: 1000
Cache-Control: no-cache
Expires: Wed, 21 Oct 2025 07:28:00 GMT
Access-Control-Allow-Origin: *
```

### Summary

To ensure optimal video playback on iOS devices from a third-party video storage server, make sure to implement the above headers correctly. This will help facilitate smooth streaming, seeking, and overall better user experience.”