Typical conference content in most popular format (1280x720 30fps). Bug: none Change-Id: I61ec1af44e65e5aec2f2f5e5ecb101b10b423c8b Reviewed-on: https://webrtc-review.googlesource.com/51761 Reviewed-by: Rasmus Brandt <brandtr@webrtc.org> Commit-Queue: Sergey Silkin <ssilkin@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21986}