It appears Granite State College (GSC) is having an issue with the playback of embedded videos in Canvas courses. We have notified Kaltura of this issue and they have escalated the ticket to their tier 2 support.
A work around is to upload the video to the Media Gallery of the course instead of embedding it in a page in the course.
This article goes through how you would upload media to the gallery - https://td.unh.edu/TDClient/60/Portal/KB/ArticleDet?ID=1235
This article goes over how you would make the media gallery available in a course - https://td.unh.edu/TDClient/60/Portal/KB/ArticleDet?ID=1219