Hi Owen!
Thanks for the video. I disagree definitely with the hand of sixes. It would be a disaster if one of these bigger stacks called us. The main reason is that the small blind is so short that he needs to shove every two hand if it folded to him. And the big blind is also going to call super wide in that spot and the chance that the small blind drops out is decent. We are also risking 18 BB's which is way too much. As your icm result shows, the shove is unprofitable and the ranges you put could be even wider in these microstake finaltables. So raise/fold with the sixes against the big stacks and raise/call against the small stack would be the right way to play that hand.
The last hand (KQs) is also a fold. The original opener and people around us are calling wide enough to make that reshove unprofitable.

Generally speaking you have useful fundamental stuff in these videos and they are good for the beginners. However, you could go bit faster some really obvious spots.