Don’t get discouraged if you can’t play the cm chord right away. It’ll take time to learn how to properly barre with your finger. It just amounts to building up toughness and strength in your finger.
One tip I didn’t mention in the video is to not practice with a metronome when you’re first starting out. It puts too much pressure on and doesn’t help.
Also go as slow as you need to in order to get all of your fingers in the right place. If you’re first starting out try only practicing 15 minutes a day. Take it easy and have fun!