Same goes for me, stopped working a few months back !
Found out the reason by searching via AW help facility which threw up the following:
Where is the Introductory Movie I recorded?
If you recorded an Introductory Movie directly to AdultWork.com it will no longer be available. Unfortunately the suppliers of this platform, Userplane, have ceased trading.
You can still upload a short pre-recorded WMV clip to our pre-existing Introductory Movie platform. This will ensure your Profile shows in search results where this filter is applied.
You can upload a pre-recorded Introductory Movie via your My Details page, under Profile Management.