An alternative to the youtube app on IOS

I've used iTube on IOS, but this app has now been removed from App store. I dont know why, but that means new users will not be able to download it.
Do you know any good 3rd party player for youtube?
I loved iTube since it made a history of my videos I watched and I could play videos in the background.
Any suggestion will be appreciated. Thanks in advance, and sorry if this already has been discussed.
Best regards Thomas