Mmkay save me I fucking hate these constant cuts in Youtube personality videos.
Anyways yeah sure, I would say this is the case. It happens in cycles on Reddit, though. Everyone used to say 'good sir', now you get downvoted if you say it. Same with 'tip my hat to you', 'came here to say this', 'an upvote for you', etc. etc. The dialect is constantly changing and if you say something outside of the current norm you'll get punished for it.
Twitter has its own dialect that occurs from the constraints of having 140 characters. It also spawned the creation of 'Weird Twitter', which is its own dialect within the dialect of Twitter that focuses on the abstract.
There's more, but I'm not sure if by talking about it I'd be speaking on 'internet dialect' or just how people communicate differently depending on who they're communicating to. There's a subtle but important difference there, I think.
Sidenote: I didn't actually watch the video so sorry if I repeated anything.