Practice them slowly and repeat the videos until you feel confident playing these 7 chord shapes (A Minor through G Minor). As I've mentioned before, if you know the 21 chords (major, minor and 7th), you can play almost all of your favorite tunes!
It takes time to get better at these chords, but keep practicing! This is the foundation for being able to be a great guitar player.
"Do not fear mistakes. There are none." ~ Miles Davis