There were multiple Cambridge Union debates, 1 hour forty minutes in total. He did poorly on all of them .. almost as if he'd never encountered a proper formal debate with rules and procedures before.

Cambridge debating is a microcosm of parliamentary debates in the UK, AU and elsewhere that I'm not entirely sure the US has in government anymore, if ever - the CSPAN footage I've seen largely features lone people showboating unchallenged, often with props.

Your 12 minute video shows a back and forth near Q&A exchange between Kirk and another not entirely opposed with Kirk taking various interpretations of well regulated militia as he saw them with little push back.

It has edits and has been self selected and post produced by Kirk to post on his channel to highlight how "good" he is.