Youtube Direct Uploading - YouTube API v2.0
YouTube API v2.0 – Direct Uploading

https://developers.google.com/youtube/2.0/developers_guide_protocol_direct_uploading

Upload videos to YouTube using direct uploading. Direct uploading lets you add videos that are in your video library to YouTube. direct-upload implementation if you want to host or store videos uploaded through your site and also add those videos to YouTube. In a direct-uploading scenario, when a user uploads a video through your site, the video will be sent to your servers. Your application will subsequently send an API request to upload the video from your server to YouTube.