That’s overly complicated for some of the users - most of them aren’t very tech savvy, and they’re watching via all kinds of devices - TV’s, iOS, Kindle, etc.
I don’t see any major security reason for access requiring a VPN. Are there particular vulnerabilities that you’re concerned about, or just those that generally come from having a web-facing service?
“I have to get over this some time, why not now?”
~ Louis Wu, from Ringworld, written by Larry Niven.
“Because I’m not ready” is also a valid answer, but it gets your brain moving towards the goal I find.