I might play with that in the future. However
Opera 29 did not crash Chrome does not have a problem with ffmpeg (does not crash) crashes are not related to playing videos, for example, Gmail just crashed in the background...I left Chrome because it's lack of support for hiDPI displays. But that is no longer a problem, so it seems to make sense to go back... it's more stable now, and does not have a problem with my remapped Caps-Lock key...