On iphone i use video lite, (after the 2 week free trial) there is 1 ad when opening it (if you get one thats longer than 5 sec, just restart the app), then there are no more ads. Also you can minimize it and use picture-in-picture
I have never done this myself (not a lot of drywall in europe), but I found this video which seems to describe exactly what you want https://youtu.be/FonedKgrP5U?t=224
On iphone i use video lite, (after the 2 week free trial) there is 1 ad when opening it (if you get one thats longer than 5 sec, just restart the app), then there are no more ads. Also you can minimize it and use picture-in-picture
Not sure if its available on ipad, though