Windows 10: Can't trim mp4 files in "Movies & TV"

I was trying to trim a video I took from Xbox Game Bar. I can access the video and watch it, but I'm unable to trim the video with the default application that is provided Trim in Photos. When I attempt to trim, it has a message in a yellow box that states "Unable to save There was an error while saving. Please try again later." I have tried for the past 2 weeks and received the same message each time. How do I fix this?

:)

 

Movies and TV app - MP4 file problem

Thanks to Ivan & Jimbo45 for some suggestions to use another media player.

Anybody else care to offer a suggestion on why Movies and TV app is not working for MP4?
Should I try to uninstall and then re install?

 

Windows 11 Movies & TV app closes after trimming the end of MP4 video.

The following is an irritating issue I've had for some time now. I am not sure why it began or even when it began precisely. I have an issue with the Movies & TV app where I'll open an MP4 file using Movies & TV, click on the pencil icon, and then I'll click on the Trim button. From here, I am able to use the first slider to trim the beginning of the video, but when I try using the last slider to trim the end, the app completely closes on it's own without warning. This happens to every MP4 file that I try trimming. I've tried uninstalling it and then reinstalling it, repairing it through Settings, restarting it, and even terminating it. After all of that, nothing has changed. I am on Windows 11 and I make sure to keep it consistently updated, as well as my drivers in NVIDIA Experience. I cannot share a screenshot as it gives no error message. Help with this problem will be appreciated.

 

Movies and TV app - MP4 file problem

Hello all,
Running Ver 1607;
As a result of a seperate issue, I recently changed to 'Movies & TV' app as my default in lieu of Windows Media Player.

When I play MP4 movies on my PC, the video is jerky and the audio is out of synch? Basically they are not watchable. AVI files play ok.

If I play any MP4 from my media player (windows share), it plays normally.

If I play any MP4 using WMP it plays normally.

I have run Defender and Malwarebytes (free) just to be sure and they both come up clear of any nasties.

Have I somehow got a corrupt MP4 codec in 'Movies & TV'? Is this possible?

How would I rectify this? Prefer to stay with 'Movies & TV'.