It's interesting that a TV manyfacturer or a HDMI cable manufacturer is not expected to be liable for the content that streams through their products. But when it comes to YouTube, they aren't treated as just a vessel but as an actual source of content. I think the distinction is just the capability of each entity.
When device manufacturers start preferentially favouring, or discriminating against, specific content, channels, or voices, I think you'll find they're similarly regulated. As televisions get "smarter", they are no longer passive carriers but active agents.
An HDMI cable is literally a dumb pipe, and the end-user controls both ends, fully.
(Whether or not they control what reaches the feed-end of that pipe is of course a different question.)
