When I bought second-hand 550D and found mentions of ML somewhere on some forums, my friend also used CHDK on his old point and shoot camera so the whole concept wasn't new to me...
But the real RAW video passion and all that came from youtube. I saw a clip which was shot on 50D in raw, it was some sort of amateur short film, just a few scenes actually, but I was stunned by the image. It was so cinematic and absolutely not like typical digital video. All colors and the whole "feel" was completely different from what we all used to see on youtube. So I immediately forgot about 4k and all marketing crap

It was ~5 years ago, or maybe more.