What he forgot to tell you is that you will need to edit out the parts you don’t want in there because not only does it record all extraneous background noise, but also when you press record there will be posts at the beginning and end of the video that probably shouldn’t be on there.
You still have to edit though…regardless. Otherwise what your left with is a patchwork quilt of a recording and that never looks good. I use the same system you have in your video, but each time I record something it picks up alot of stuff at the beginning and end because there’s no way to record directly from the screen while you’re operating the app. …unless there’s something I’ve missed.
Editing is quite easy. You can use some apps on the IPad or put the recording on the computer. To deal with the noise try tap on your device lightly and record when no one is home with your device case off