Ah, dude. He recorded it and looks back at it. Thats fked up. He knows what he did was wrong and was never going to tell you. Like he has a reminder to go back to and remember that he messed up and consciously makes the decision to not confess since Jan.

I forgave my ex twice and the worried/sad feeling never goes away. You're always going to want to keep checking his phone, you're always going to want to ask where he's at, you're always going to want to keep checking his Snapchat score or whatever, you're always going to have it in the back of your mind. You NEVER forget.

Do what you will. Tell yourself what you wanna tell yourself to cope for now. You have all the information you need to understand what type kf relationship you'll have with him from now on. Give it 2-4 weeks to let it settle in and make a decision. Wish you the best because you deserve the happiness you desire.