Ahodges/video upload

Initial draft of the "Processing Video Files" guide for consortium members describes the procedures needed to get an institution up and running (video_prereqs.rst) and for course teams to upload video files (video_uploads.rst).
An HTML version is available at http://draft-processing-video-files.readthedocs.org/en/latest/
@nasthagiri, @frrrances please review video_uploads.rst in particular.
@lou-wang, @srpearce please review from your knowledge bases. 
@mhoeber, @catong FYI.
Sending HTML link to Greg Martin and Rachel Grubb also. Please tag any other reviewers as appropriate.
Rachel would like to begin sending the HTML link to interested course teams ASAP.
I don’t add managers via the CMS. Instead, here are the channel manager steps that we use and share with members:

1) Sign in to the Youtube account (https://youtube.com/) that’s connected to the channel (This will most likely be your CMS-administrator@gmail address) 
Note: If you have multiple YouTube accounts, be sure to switch to the Google account of the correct channel.
2) When logged in to the channel, go to the channel's account settings or go to https://www.youtube.com/account
3) Click Add or remove managers. A popup opens.
4) Supply the email address of the course team manager. 
5) Click Invite. An activation message is sent to the email address.