Urriak Uruk
Gaming is fun, and fun is for everyone
Yes, it's just more drift on a definition that used to be fairly narrow in scope in my experience. Now like many RPG terms people use it to describe "that thing you're doing that I don't like." Useless.
Pretty much. The problem the video seems to have is "People are detailing their backstories too much, that backstory should be made in the game." As opposed to "railroading the DM," which that isn't really.
And I'll add, plenty of DMs prefer to have characters with detailed backstories, as they find it easier to mine for stories that resonant with the PCs. So this is really just a case of preference as opposed to "what is actually better."
The video makers also seem to be more OSR-leaning, which obviously isn't that keen on backstory. The way they phrased "Everyone loves options, we aren't complaining about more options, BUT" especially felt like "Seems like your complaining about more options?"