When I weigh the choice of handing over my personal videos to a company that is explicitly and actively going to use them to:
train and improve their massive corporate AI tools
develop their targeted ad platform (which is their real product)
build a comprehensive profile about me and my family
Or
Putting a NAS at a friends house, or paying a couple bucks a month for some block storage.
I end up preferring the second set of options. It's fine if you don't, but don't pretend you have no idea that your personal videos and information are valuable to Google.