Bug Description
I am unable to preview newly uploaded MP4 files in my repository, while older MP4 files continue to display correctly. All video files, both old and new, are under 7MB.

The older MP4 files embed and play perfectly when linked in a README.md file. However, the newly uploaded files only show a white background with a progress bar and do not play. The video files themselves are not corrupt, as they can be downloaded and viewed locally without any issues.

Steps to Reproduce
Upload a new MP4 video file (under 7MB) to the repository (e.g., to a Videos/ directory).

Add a link to the video in README.md using the following format:

Markdown

Video Title

Link to Video
Navigate to the README.md file in the browser to view the preview.

Expected Behavior
The newly uploaded MP4 video should be embedded and playable directly in the file preview, just like the previously uploaded videos.

Actual Behavior
The video preview area is blank (white background) with a non-functional progress bar. The video does not load or play.

Troubleshooting Steps Taken
Tested on multiple devices and browsers.

Cleared browser cache and performed hard refreshes.

Re-uploaded the video files multiple times.

The issue persists despite these actions.

Attachments
Attachment 1: A screenshot of a previously uploaded video that previews correctly.

Attachment 2: A screenshot of a newly uploaded video that fails to preview.

Any help would be greatly appreciated.