Yes, you highlight that a TV livence may be required for some content on Youtube. It is apparently also required for some content (live) on Netflix [1]. For example it seems that WWE Raw, which is live and on Netflix is deemed "live TV" [1]:

"Services include YouTube, Netflix, Amazon Prime Video, Now, Sky Go, BBC iPlayer, ITVX and more. Live TV or events can include:

Champions League matches or live channels on Amazon Prime Video

WWE or NFL events on Netflix

News or sports channels on YouTube"

It's a bit of a mess...

[1] https://www.tvlicensing.co.uk/check-if-you-need-one/topics/w...