What are overlay videos?
Overlay videos must contain an audio and video track and be at least 15 seconds in duration. Supported file types include: 3GP, ASF, F4V, MKV, MOV, MP4, MPEG, MPG, WEBM, and WMV.
Overlay Videos can be uploaded at any resolution (ex. 1080p), but that video will stream at 896kbps to viewers. The larger the dimension of the video, the lower the quality of playback. If you want to use a high-resolution file, please review the quality of the uploaded file to make sure it meets your standards. If it does not, you need to decrease the dimensions of the file.
You must upload overlay videos before your presentation on the Event Content page of the setup in the Media Clips section.