Any good videos or websites with pictures to help a swimmer with technique?

[Anonymous]

Obviously that wouldn't be as good as a private lesson with immediate feedback, but one of my beginner swimmer kids learns well from seeing a picture or video (rather than descriptions or written instructions) and is having trouble grasping the fine points of techniques that the coach shouts out or describes during swim team. It's hard for them to see the junior coaches demonstrate if they're not in their lane. Or they just don't repeat enough times for it to sink in.

Has anyone found anything helpful online to improve technique? Things like "streamline" or "cupped" vs ""uncapped" hands.