Measure 3 is incorrect in the video rhythm hits. Sorry about that. We should have double checked it. The last hit is on the & of 3 and is a dotted quarter note.
1) Yes, this is how I do it. But each teacher has a unique way of teaching and Matt’s is more related to playing rhythms by ear.
2) Hits are on red, non-hits white. To be honest, I’m not sure if a color change would make a difference. Although, I have in the past only shown the hits. So for that bar, it would have been:
1&2&3&
Which is easier to see and count, but it omits &4&, which may confuse folks that are newer to counting rhythms.