(In reply to Andreas Stieger from comment #4) > (In reply to ross from comment #2) > > it just said your browser doesn't support html5 video player > > Again, which video? Which URL? > > > > I have installed gstremer codecs > > Explain how exactly how you did that. I have found the cause, ffmpeg-5 is not include in official repository and packman repository, many website needs ffmpeg-5 to play video