Filtering Interactive Boards?

Just wanted to ask a quick question on how everyone else is filtering / restricting / securing their interactive boards. We haven’t got many so usually don’t connect them to the internet and just use HDMI from a laptop/desktop, but we’re looking to tear out all our projectors over summer, so I’m wondering how everyone else is managing and filtering the built in browser / features. It seems that identifying users for role / identity based filtering would be difficult(?) but limiting the boards to student level access would block things like Youtube that teachers often use.. How are you doing it? Thanks!