Is it possible to take this sort of high-road approach:
"Look, you're probably right that I didn't consider your feelings when making my videos. It is equally inconsiderate when you press your beliefs around me since I find them to be verifiably false. I'll agree to pull all my videos and make sure I don't make any comments about my beliefs, either in a public forum or around you, if you agree to do the same for me. And we can just enjoy each other as a loving family and leave our personal beliefs to ourselves."
If they are reasonable, that may work...