Puzzle about uploading videos to the site

Question

YouTube

Please help the community with this puzzle.

1. The video is sent for participation in the competition to a site that does not have its own video hosting.
2. The participant does this by X , without going to some other resource, but also without using the site server (that is, in fact, the video is located on someone else's server).
3. The video is taken by the contest organizer from a third-party resource and posted on YouTube.
4. Video from YouTube is inserted into the site.

X is a fairly simple solution that does not require serious programming.

Question: What is X ?

Answer 1

That is, it is necessary for the user to look as if he uploaded the video to your site, but in fact the file went to another server?
You can use a file sharing service.
But better - Youtube Direct: code.google.com/intl/ru-RU/apis/youtube/ytdirect.html

Answer 2

Email?