We are currently using Lightspeed Relay for our 1:1 Middle School iPad program. We've been having a major issue with YouTube. We had to basically block all of it for students because the iOS Relay Smart Agent doesn't content filter the videos and you cannot create whitelists of specific channels or videos. This is a problem because anytime a teacher wants to assign a video of some kind they aren't able to and have to show it whole class. It is incredible how many websites use embedded YouTube videos.
There is apparently a fix for this "coming soon" but in the land of remote learning, we need a fix now. I'm curious if anyone else has come across this and what you use for content filters on iPads.