It shouldn’t have worked but it did: in 2018, YouTube relaunched Eighties martial arts series The Karate Kid, picking up with the story of its lead characters (and featuring the same original actors) 36 years later. Its name: Cobra Kai.
Nostalgic and feel-good, the show did extraordinarily well, and by the time its second season rolled around, the first episode had garnered 50 million views.