When it comes to video playback, the source of an issue can be upstream with the content provider, downstream with the end user, or in the middle with Philo Edu. If a video won't play for you, identifying the culprit can take some detective work so don't hesitate to submit a support request for assistance.
Here is a compilation of the most common video issues and their solutions:
The video is choppy or isn’t showing up.
The channel is displaying a screensaver.