1. Videos must contain absolutely no fluff. If the video could have been made 20 seconds long, then it must be 20 seconds long. It is unacceptable for the video to be 60 seconds long with unnecessary filler content, intros/outros, "please like and subscribe", etc. If the "moment" of your video is your child saying something funny, it had better be a 5 second video of the quote; a 5 minute video of your child playing, with something funny said at 3:45 into the video is not even remotely acceptable.
2. I only watch video if I have headphones in. I don't always have headphones in. You're going to have to invent sound isolating, in-ear implants that can be turned on and off on demand, to replace my $1500 IEMs that I have to manually insert and remove to switch between interacting with the real world vs. my device.
3. Social awkwardness. I will never be comfortable recording myself for every update, and furthermore will never have the patience to invest the time required to edit my own videos to comply with the requirements of point #1 above.
tldr; "All video" is pure bullshit. I can't see myself producing video content to share, and I do not have the patience nor the time to watch other people's overly long videos.