When no content types of document type "Video" are available the video dialog shows images. The image list should be empty and the "Upload new image" button should have 1 pulldown option with "No content types available"
Why is the full domain inserted? --> insert as /storage/blabla... (instead of http://www.boring.com/storage/blabla...)
When you have multiple Video content types, the "Browse video" dialog contains a button "Upload new image" instead of "Upload new video"
Please add an option "All content types" to the select box and use it as default.