You may find yourself hearing a whoosh.

And you may find yourself overlooking a pun

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.

Kermit sounds like "commit". Kermit appears in the linked video.

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.

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.

Click the link!