I looked again and I saw no laughing. It definitely was intentional as he stated that he was trying to break up a double play. But that's not illegal. The rule states: When sliding into a base in an attempt to break up a double play, a runner has to make a "bona fide slide."... He made no attempt to lift his leg to contact him, change his path to hit him, or lose contact with the base. He did go spikes first but again, not illegal. The full rule is here.
In McNeill's interview, his complaint was that he was not trying to turn a double play so there was no reason for the late slide. How they heck would Hoskin's know that? He cant see if its close at first. Also, McNeill was clearly trying to make a transfer to his throwing hand as he lost the ball. I get that McNeill could have gotten hurt so I understand some offense taken, but he was going on for a long time about this. If he doesn't want to get hurt, he should have jumped up after he caught the ball instead of keeping his foot planted. We used to see this all the time before this rule change.