Ears forward. Eyes half closed. No teeth to be seen.. I don't think the video has audio, but probably purring like a lawnmower.
That cat is chill as fuck, and loves the little human.
Unamused cat would have its ears back. Nervous or hostile cat would have its eyes open. Annoyed cat would be batting that kid like they would an annoying kitten. Really annoyed and nervous cat would be hissing, and probably already out of the chair and hidden somewhere the baby couldn't reach.
English ain't my first language, but I've often seen “cleaning” being used without a direct object, either because it's implied (“put away after cleaning”) or because the action is meant to be generic and not limited to a specific object (“I'm going to do some cleaning”)... in this case it could be both (specific: the cat itself, or specific parts thereof, generic: the cat itself, the other cat, the coach, anything within reach; cats can often get carried away, when cleaning).