Windows 10: playing video on windows apps like the films & tv app, photos app and windows 11 media...

No matter the resolution, framerate, video file type or the video player used, the video always plays fine for about 10 seconds and then stutters, lags and skips frames when the video is played in full screen. I have updated both the system bios to latest firmware and updated the display drivers, still the problem persists. I have played the video with nothing else running in the background but nothing changes and I have factory reset and repaired, terminated and fully reinstalled the apps from scratch several times, and yet still nothing fixes it. IMPORTANT NOTE: This howvever is not an issue

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video and sutitles of .MKV file are not working in Windows 10 Media Player and in Film & TV app

video and sutitles of .MKV file are not working in Windows 10 Media Player and in Film & TV app but audio is playing.

how to watch videos and subtitles of .MKV file in Windows 10 Media Player and in Film & TV app.

 

films & tv app is not playing any video

films & tv app is not playing any video

 

Film and TV app codecs, Windows 10

I have a digital recorder that saves the files in '.ts' format, which by default opens in the Film and TV app in windows 10, but then states that the format is not compatible. The files open fine and play in 'Windows Media Player' however they will not display
as thumbnails in 'File Explorer' which they did in Windows 8.1 before I upgraded. I can convert them to '.mp4' and then see the thumbnails. The files will then play in 'Film and TV' and in 'Media Player'. Is this a codec problem, or would I be better served
just getting rid of the Film and TV app and setting all the defaults to Media Player?

I understand there are a very large number of video formats about, but Media Player clearly has the necessary codec and Film and TV on the same computer does not.

Just to confuse the issue I have other '.ts' files from a different source, which play fine in both apps.

Any suggestions as I would much prefer to have one centre for handling and viewing my videos?