K-1 is sorta back. Its not the same heavyweight focused org with Peter Aerts and Badr Hari and so on. Basically when the old K-1 was about to die, they made a spinoff org that was focused on the lighter weights (70kgs and lower) called Krush. That org got that rights to do K-1 events back in 2014 and have been scaling up.
If you're open to lighter weight classes, I suggest you check out their
youtube channel as literally all of their fights are up there. It might be a slog to try to figure out which events are where, so I've made a
playlist of one of their better recent events (their 62.5kg WGP) in order so that you can sort your way through the action.
There's a lot of Chinese orgs, but the big ones are Kunlun, Wu Ling Feng and Glory of Heroes. Its a lot harder to follow those since their media footprint is mostly on the Chinese internet, but Kunlun at least has a youtube vid with
good fights up on it.