Create instructional video for Learn about Omniauth and SSO

We need a video covering the basics of git for #1593 (closed). Once the video is completed, please upload the video to the Onboarding Folder' in Google drive. If you recorded the video using Zoom, please upload the video+audio version of it so it contains everything.

If your video needs editing, please ping myself (@jcolyer) in this issue and I would be more than willing to do this for you!

The video should cover the following:

Checklist:

• Understand what GitLab OmniAuth is
• Know how to enable GitLab OmniAuth
• Know how to use various SSO methods:
  • GitLab.com as a provider
  • Google as a provider
  • LDAP
  • SAML

Documentation:

• OmniAuth
• Integrate your server with GitLab.com
• Google OAuth2 OmniAuth Provider
• LDAP
• SAML OmniAuth Provider