I see what you're saying, and will let the developers know.  However, in the meantime, you can use the search feature to find and watch videos.  For example, if you're searching for check for understanding, after you type that in,  a list will appear of articles and videos from which you can hoose.  I tried a couple of videos, and they play fine through this way.  Sorry for the trouble, and will let you know what the developers say.