I like your first video better. i stopped watching around 5 mins in.
First minute scared the hell out of me. Both ties ins a few inches below the cut? Please don't do that again. Your lanyard could have gone under the limb you left.
You need to work on sling/choker placement. Either take more wood, or get those slings further out on the limbs. Way too much movement in those picks.
Keep your damn hands away from the piece!
If you are going to keep up with the mismatched cuts, get out of the way! 2 steps down and a slide over to the left, THEN signal the op and you'll keep those teeth a little longer. With those brush heavy picks, when the op cables up to break your holding wood, that butt is going to come up fast and directly back at you. And the more tension he needs to put on it, the faster its going to happen.
Learn where the pressure is going to be. Also goes with sling placement. Cut the tension wood maybe 1/3 of the way through, then back cut straight through and you will get the saw stuck a lot less.
Be careful out there.