With the new revamp of the Wanderlust TV website the My Library Tab is not yet available. Our developers are aware of the issue and it should be corrected in the next couple months. Until then you still have access to all of your purchases but will have to search for it, using the search bar.
To make the videos easier to locate in the meantime you can always create a favorites list.
To add a video to your Favorites list click on the little star that appears under the video. To delete a video from your Favorites list play the video and click the star again. It will then be removed from your list.