Congratulations on a smooth and relaxed stroke. I've watched the video three times and saw virtually no splash during hand entry.
I think your hand extension into the water could be steeper and closer to the head. Your left hand entry is much flatter than the right hand.
On your third 25, that pesky scissors kick is evident. Maybe it's due to the different hand entry positions. In the underwater shot your rotation appears symmetric, so I don't think the scissoring is attributable to that.
Thanks for providing the underwater footage. It really provides the total perspective of the stroke.