Pick the motion and send your opponent a link. A timed, moderated debate runs in the browser, nothing to install. Each side is recorded in full quality on their own machine, so a bad connection never spoils the video.
Afterwards: a side-by-side video with names, rounds and the clock burned in, each person's own recording, captions, and an AI referee's report. Go live to a watch page if you want an audience.
Topic, sides, and a format: openings, rebuttals, open discussion, closings. Or your own rounds.
You moderate: the clock, who has the floor, pauses. The other side joins from the link with just a name.
Minutes after you end it: the side-by-side video on a watch page, downloads, transcript and the referee's calls.