Yes! You can duplicate your class which will automatically re-add your class as a draft within your profile. Then, just edit the class as you usually would, add your availability and media, and press publish. In order to duplicate your class:
1) Go into your account under your classes
2) Hover over one of your already existing classes
3) Press the 3 dots in the top right corner, and press duplicate class
4) The page will refresh and you will see that you have class named "copy of ..."