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I just had a look at the video codecs, 9 out of ten have a hvec codec and the other one has avc.
So I have to recode them in H264 to be sure?

I'm using the trial version to see if it works.
I'm running on a Samsung Galaxy S22 Ultra.
I've got two tv's with a chromecast dongle connected.
Mezzmo see my dongles.
I already tried with VLC...