That video has no context whatsoever merely narrative. Moreover, I assume you are not East Javanese? Thus, not familiar with the sociological situation here?
Isn't that curious that the local police doesn't do anything to stop them doing so, while our police here protecting their embassy to prevent such eventually to even happen in the first place?
No point expecting anything from our gov't on the matter. Not only they don't have the slightest clue on how to do it the current efforts look like it were run by a troop of amateurs.
BTW take a look around in this forum, because I've noticed an Indonesia poster with similar undertone (separatism) in his posting with the usual posting of fake news outlet and amateurish photoshopped pictorial. I haven't check further, but it's also similar to how it starts in /r/indonesia. At first, it's merely undertone, once it receives enough positive respond its get escalated.