akshaybharadwaj11/gameplay-video-analyzer ? reverse-engineered prompt

Build me a web app for reviewing game film and tagging plays.

I want to be able to load either a YouTube link or an MP4, play it in the browser, and mark start and end times for a play using the timeline or keyboard shortcuts. After I select a range, I should be able to add an annotation with a tag like SPIN or JUKE, plus a modifier and down. I also want an editable table of all annotations and a place to import or export the tag schema as CSV.

On the analysis side, add a backend that can download videos if needed, track the action in the clip, and calculate simple stats like how many defenders are in front of the ball carrier for each tagged play. Then show those results in a simple graphs view. Keep the styling in a single CSS file, and make the app feel clean and easy to use. If you need to check current docs for any library details, look them up online.