I could have gotten on leaderboards for some categories but I don’t know where to get the video link from.

1. Upload it to a video sharing website (like Youtube)
2. Copy the link it gives you (it should look like "" or "" unless it is a youtube short, on mobile you can use the share button while on pc you can copy the url at the top or right click and copy the link that way)
3. Paste the link into the video tab on the submission page and you should be done (if you right click and copy url at current time that will timestamp it, which is useful if your video includes multiple attempts)

Thanks!