When making quickie recording videos with my iPad and audio interface, I’m just using the built in iPad camera for the video. It picks up my mic via the usb interface but only records to the left channel (presumably if I added a 2nd mic to my 2 channel interface I’d get left/right but 2 mics are overkill for recording practice videos.).

Still. listening to audio out of just the left channel makes me crazy. So, open up the resulting iPad video in Handbrake, go to audio tab and select mono. It will convert the left channel only to a mono signal that comes out of both speakers. Sounds much nicer and only takes a few seconds to do.