Update Tor Browser 4.x videos
Sponsor O requires support (just me) to add Tor Browser videos showing verification, installation and usage. But we're swapping Erinn's key soon and recording videos showing her key will confuse users.
GitLab is used only for code review, issue tracking and project management. Canonical locations for source code are still https://gitweb.torproject.org/ https://git.torproject.org/ and git-rw.torproject.org.