Benign fasciculations syndrome, tongue twitching example - BFS
I've twitches all over at random and I've recorded a few but never my tongue, so I thought a very quick tongue twitching video was a good idea.

Note* A fairly common trait with people who have BFS would be anxiety, health anxiety or some type of chronic anxiety... Although it may not be the root cause it’s reasonable to suggest that it fuels the condition.