I watch a lot of educational material like seminars and various courses via AirVideoHD and I would absolutely love it if I could split the screen with note app for example. Now the "side app" feature works but it dims the video and overlays on top of it. This is problematic if there's slides etc. that I want to jot down. Another annoyance with side apps is that when the keyboard pops up, the video stays full screen so the keyboard cuts A LOT of the video.
I'm Early Access subscriber so I wouldn't mind seeing it there
And by the way, I absolutely love the app and the work you're doing. AirVideoHD is definitely in my top 3 most used iOS apps