Are you not asking about the first question in the ‘Other’ section at the end?
I.e. “one-minute video (unlisted Youtube video). Please follow the Y Combinator application video guidelines: https://www.ycombinator.com/video/”.
It appears that they want applicants to upload a video, set it to private, and then paste in a link (rather than sharing a video file directly).
Are you not asking about the first question in the ‘Other’ section at the end?
I.e. “one-minute video (unlisted Youtube video). Please follow the Y Combinator application video guidelines: https://www.ycombinator.com/video/”.
It appears that they want applicants to upload a video, set it to private, and then paste in a link (rather than sharing a video file directly).