In my early videos, Prior to May 2018, I had an older, and rather large IPad. (fourth generation I think) I mounted it to the yoke with one of these. http://www.transair.co.uk/sp+Apple-iPad-RAM-Mounts-Ram-iPad-Complete-Yoke-Mount-Kit+1426
I now have an ipad mini 4, wifi/gps/cellular version, and I mount it with the same yoke attachment, but a smaller cradle. Make sure you get the right attachment/cable for your needs.
This is the one I currently use:
Do make sure the flight controls are unimpeded by the mount/iPad. If you don’t adjust it well, it can get in the way of the mixture setting on the PA28.