i like your videos, and if you don't mind, i'm going to give a bit of constructive advice here.
if you were working on grip before,i'm assuming there is some issue with the grip??? if not, maybe i'm way off, but i also get the impression there is some issue with the "out" as well since you say he's progressing. and by issues, I don't mean there is necessarily a problem, just that you are working thru the stages of teaching, it's not a finished product yet.
This is in regards to the first video, I haven't watched the second. I see you making some conflict with your dog. The decoy is still fighting and moving with the sleeve when you tell you dog to out. and that is perfectly fine for a dog that has no grip issues and is in a point in training where they have to learn that out is out no matter what.
BUT for dogs with grip issues or learning the out and grip work, the picture should be very clear at first for better understanding. A fighting helper or moving helper is fair game to get full hard grips, and there are ways to make that better. When it is time for the out, the helper must be completely neutral before any command is given.
Of course doing it this way sometimes results in a dog cueing off the helpers actions and doing an "automatic" out when he stops, but there are things to do to prevent that and IMO it's much easier to deal with that and not let it become a problem, than outing a dog off a fighting helper before they are absolutely clear on the exercise.
giving an out to early before the dog is clear and the helper is ready can undo grip work very quickly. Make sense? Like I said, I like your videos, things look good, just something I noticed.