Hi Dennisgl,
[br]The picture-in-picture feature you may be referring to is tied to Mozilla Firefox web browser, and is not a function of Guitartricks video player. You can read about Firefox's new picture in picture feature here, and ways to turn it off: https://support.mozilla.org/1/firefox/71.0/WINNT/en-US/picture-in-picture
We're currently looking into a fix so that our video controls do not overlap with Firefox's new button.
Thanks for bringing this to our attention!
If you have any questions, comments, or concerns, please contact us.