Not a difficult change, not a lot of oil (<1 liter), do it every 50k km if you want to be super safe, but honestly even 80k km is probably fine. Idk if the video goes through it, but on absolutely any car you change the diff oil on - crack the fill plug open first - only once you know it's not seized shut should you open the drain plug.
I make it a point to change on all my vehicles if I intend to keep them for any amount of time because I buy them heavily depreciated with tons of kilometers and the previous owners have almost always neglected it. Is it likely that I'd have a diff blow up on me if I didn't? Probably not, but nice to be safe and to know the next owner of the car won't have the diff blow up after a few months of ownership either.