@MrT10001 Thank you for your quick message.
Assuming that you have installed the YouTube app from the Open Store on a Lenovo Tab M 10 X306F (X) and you didn't encountered this issue ,then the conclusion is that the display for my tablet has to be replaced.
However, before doing this I wish to check the GPU and the display health. Is there any chance to know how to do this in UT?
Or maybe by uninstalling the app there are some orphaned settings leftover. Would reinstalling UT be helpful?
Thanks for your time.
Gabriel