NewPipe, Clipious or LibreTube ? which is better and why?

It’s already selected. I am getting the PiP mode when I click on the PiP mode below a video but not when I click the home button. When the home button is pressed then only the audio works. Any other help?
Tried downloading videos from Libretube, selected only video then tried different formats but there is no sound in any of the videos. Any idea why is that? If I select download only audio files then the audio files work great without any issue.

Tried downloading videos thru newpipe and the videos had sound. But even if you browse newpipe without even playing the video, the cache folder in Android>newpipe directory, especially the picasso subfolder in cache gets filled with thousands of junk files which eats up a lot of space. Can you please check the same in your phone and is there a way to tell newpipe to not save these junk files or delete them automatically?