RE: wild arrow flight
I don't want to sound too critical but you can obviously see that the cams are out of sync. If you can't adjust them yourself then take it to a shop that can do it for you. Ask him questions and you'll learn that it's not such a hard fix.
The other thing is that a prong rest does not work with fingers due to "archer's paradox". He needs to either shoot a release or get a rest with some sort of side plate (plunger). Star Hunters wroks well as does any flipper with a Berger button.