In the 80s, if you got up really early, like 5 am, Discovery would sometimes just put a camera on a professor giving a lecture. It was pretty cool. I guess we have YouTube for that sort of thing now, but you even make a suggestion like that to a Discovery executive now and they'd probably try to murder you.
Discovery showing Time Team made me a lifelong fan. Most of the old episodes are on YouTube now. They have a Patreon to fund new episodes. They aren't as good because Tony doesn't host them, but they're still fun.