Thanks @[email protected] ,

by any change I’ve tried codecs="avc1.4d401f" with my videos but of course it’s not working.

Whats drive me crazy, is when open trough file:/// Firefox can play it, but once inside an html page, you have to specify the right codec !? WTF

Funny when I open .mp4 container version of it, by file path (url bar) like file:///X:/path/FooBar.mp4 it works, so Firefox can Open it… (now still to make it work inside an html page 😑 )

for .mkv it trigger a file download…

Thank you @[email protected] no matter the type I enter, it’s still not working…

btw the videos on your link are encoded H264 with , not AV1

Codec: H264 - MPEG-4 AVC (part 10) (avc1)

Thank you @[email protected] ! hooo so I can hide any post not only mine ! ok then it make more sense :D