Here's my interpretation (I'm not a translator - I find it hard enough doing my own videos!)
Sut i fod yn ffrind da - How to be a good friend
"Do you want to be a good friend?
Here's how to be one.
Here are three things that will help.
1 - don't get angry lots with your friends.
2 - help your friends and be kind to them.
3 - protect them from bullies and help them when they hurt on the inside or the outside.
If you do these three things, you will have a lot of friends"