Chesskid.com

Chesskid is a website like Chess.com but for kids. You can play against robots from rating 200 to 2000. You can play fast chess for five minutes, 10 minutes, and 15 minutes. There are puzzles and lessons. There is also a video section.

Go to the three dots, and you will see Chesskid. 

Here some sections and how to get there

Video

Go to learn and you will see a video section here is how that looks