Possibly English is not his first language, and also humor does not transmit as well online or in text form. It's why stand-up is funny, but if you read a transcription of the jokes it would not be nearly as funny.
It's a deliberate pun.
I don’t get the pun. Can you explain?
Click the link!
You are right re: kermits/commits.
They are referring to a cover of once in a lifetime performed by Kermit the frog snd the muppets.
Kermit sounds like "commit". Kermit appears in the linked video.
I'm going to go out on a limb and guess that the cover version is by the Muppets, the most famous of which is called Kermit.