From time to time some students have technical problems viewing the lectures. Usually the cause is their internet connection is not strong enough. Rarely is AST's server the cause. We would know right away if it were our server, because we would get many complaints instead of a couple. Here is a fix in case you have experiences that it is not working.
If you are using your iphone/iPad, make sure you have a strong signal.
If you are at a local store using their wifi, probably it is not
sufficient. Usually there are too many people on the wifi signal that it
hampers the speed of the individual connection.
If you are on a laptop or tower, right-click the video and save the
lecture to your computer. Then you can access the file wherever you save
it and it will be working off-line.