I totally get the task board and I do almost the same thing myself. The demo idea is cool though. It makes sense that whenever the coding agent wants some judgement from you it spends a bit more tokens to make a report optimized for a complete and readable explanation. I doubt it should be a video (videos impose a minimum time required to get through them), but there's certainly a lot more you can do compared to coding agents' default text responses.

I find the time unproblematic. A bug fix is typically 30 seconds, a new feature 1-3 minutes. I want to review those before they go out, and any other way to review them I can think of would take longer.

FWIW, if the work is better shown on an HTML page (e.g. to show stats of a previously flaky test), the agent can do so.