A: Loading: The video is in play, but it is frozen. Check your internet connection here https://www.speedtest.net/. You need at least 5Mbs to have video play if not more. Make sure there is no heavy use outside of you playing the video.
B: Not showing up: Try opening up a course in a different browser, if it works the other browser may need updating to watch videos. How to check to see if your browser has been updated, https://support.google.com/youtube/answer/175292?hl=en.
C: Still not showing up: try opening it up into its own browser, select the share icon on the video, paper airplane.
D: Again, still not showing up: Check with your school or parish admin, Vimeo may need to be whitelisted for viewing.
If further issues occur please contact Customer Care at at 1-800-533-8095.