this Avisynth+ generated mp4 has errors?

[Russai]

Why this video is not working when i upload to Telegram or Reddit does not allow to post saying its not .mp4.

Is there something wrong with it?

P.S. Telegram for PC converts it to GIF on upload and gif plays on PC, but not on Phone.

[Selur]

Thats FFV1 inside the mp4 which is allowed in mp4 (http://mp4ra.org/#/codecs), but is so uncommon that most platforms will not support it.
-> better use H.264 or H.265 as video formats.

[Russai]

Thats FFV1 inside the mp4 which is allowed in mp4 (http://mp4ra.org/#/codecs), but is so uncommon that most platforms will not support it.
-> better use H.264 or H.265 as video formats.

That was just one of experiments with different codecs i made after regular did not work, this is regular HEVC, however it does not work either on Reddit for example its not recognized.

Maybe it has to do with file size being so small ?

[Selur]

From the looks of it, Reddit only supports H.264.

[Russai]

From the looks of it, Reddit only supports H.264.

Thanks, that was it, now it uploaded fine to reddit after i converted to AVC.