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!