If you have not heard of Periscope you will soon. Periscope is a live streaming video app connected to your Twitter feed. Stream live video from your iphone or smartphone on Twitter.
In order to upload your archive from Periscope to YouTube do this.
Once you download the Periscope app go to settings and click auto save to gallery. Once you authorize this setting all your live streams go to your gallery on your phone.
Then open the gallery locate your archive and upload to Youtube.
UpDate 05-05-16 Add #save in yout title of broadcast and will save forever.