Background Video Not Playing

[keitwb]

I'm running Firefox 143.0.4 (64-bit) on Fedora and I when I go to the main page in "light" mode I see a white background with no background video.

The console has the following errors:

Media resource https://flightctl.github.io/assets/medias/background-342b907fddcdaffcd5cf685123f13cdc.mp4 could not be decoded. [flightctl.github.io](https://flightctl.github.io/)
All candidate resources failed to load. Media load paused. [flightctl.github.io](https://flightctl.github.io/)
Media resource https://flightctl.github.io/assets/medias/background-342b907fddcdaffcd5cf685123f13cdc.mp4 could not be decoded, error: Error Code: NS_ERROR_DOM_MEDIA_DECODE_ERR (0x806e0004)
Details: virtual mozilla::MediaResult mozilla::FFmpegVideoDecoder<61>::DoDecode(mozilla::MediaRawData*, uint8_t*, int, bool*, mozilla::MediaDataDecoder::DecodedData&): avcodec_send_packet error: Unknown error occurred