Thank you for your reply @Patrick1
If my updater is not mistaken, the OS is up to date.
Playing the video back locally does the same thing.
Video formats:
Youtube Videos: I am not sure. Whatever Youtube is providing.
Recorded Videos: The format OpenCam is doing. Maybe this screenshot helps.
I agree, VLC should play back the videos flawlessly. And it did. For example when I was in Holidays from Nov. to Feb. this year,iIt did.
I never played back .ts files. Is that like TIFF is to PNG?
I am sure its a software problem, because it was all ok before. And I cannot say since when this happened. Because I never noticed, until I went to holidays, which is now, and now I am using those features of my phone. In normal working days, I use it as a messaging device, buy train tickets and to browse reddit on the train.