Cobra Kai, the series, started on the fairly obscure YouTube TV. It's now moved to Netflix though, so you, likely, don't have any reason not to check it out. You can get caught up on seasons 1 & 2 while you wait for season 3. Based on this trailer, it looks like it's going to be the best season yet.
By the way, if you are a fan of the old movies......there are a of nostalgia nuggets and easter eggs throughout the show. Seriously, you really have to give it a shot.