There are a bunch of free channels on the internet that some TVs can just stream without a dedicated app. These channels are supported by ads like cable/whatever channels, but not locked behind a subscription. VLC is supporting whatever formats they use to allow (or make it easier; IDK) people to watch them if they want.
The other part is that they're working on web assembly to allow sites to use VLC as their embedded video player.
If you're actually expecting people to transition without asking for help on a regular basis, you don't know people.
You just made yourself their IT guy for life.