It is good you found out now. And as you said, it is a trend for him. He has been cheating and hasn't stopped. For him to even go as far as makung a sex video shows how root deep he is into his activities. If you can condone the cheating, you can go ahead with him. But if you can't and you need peace of mind and a good marriage, pls take a walk. Think about yourself abd what us good for you. Be selfish. Forget family expectations.
And no dear...not all men cheat. Never believe that rubbish. It is only peddled by guys who lack self control and ladies who keep dating the same kind of men that cant hold body.
There are faithful men out there