If you are a paid user and cannot make the Live Classes at the scheduled time, then you can access the Live Class Recordings from your student dashboard under Recorded Classes

Unlike Live Classes, you will not need to register for Recorded Classes. They are not counted from your total number of Live Classes thus you can watch as many as you wish. 

Noted that the Live Class Recordings are available to watch for 2 WEEKS ONLY and that there may be a delay between the end of a live class and the upload of its recording due to editing requirements.