I can't play the video at all in firefox desktop because the video is encoded as h265 which firefox won't play unless specific extensions are installed.
h264 is the better choice for short progressive download clips on websites if compatibility matters.
Your system is broken, FF has supported h265 on every OS for a long time now:
>Firefox enables HEVC on:
>Windows from Firefox 134 using either hardware (on devices that support it, where the range is the same as Edge) or software (on Windows the user must pay for and install an extension)
>macOS from Firefox 136 using either hardware or software.
>Linux from Firefox 137 using either hardware or software (via the system ffmpeg).
>Android from Firefox 137 using hardware only.
https://developer.mozilla.org/en-US/docs/Web/Media/Guides/Fo...
...and even if this wasn't the case, FF has 2.5% market share. Using a 20 year old codec for 2.5% would be insane. If anything, he should be using a newer codec like AV1 that's also widely supported.
huh. plays fine for me in firefox stable on linux, and with no extensions in firefox. Do you mean OS extensions?
Plays fine for me in Firefox on Windows.
H265 plays fine in firefox for me! No special extensions, just linux