Rubens This came later.
The original idea was that folks would submit videos to YouTube or Vimeo and share the link in the submission.
That's all! Done.
Later, there was feedback that some folks might only have MP3s and needed an easy way to upload it for the recital. Just like PW.
So I provided a Dropbox link where MP3s can be uploaded to. As an alternative.
The <PT> thing is nothing... it just indicates to me that I have to get the MP3 from Dropbox and update the submission with the correct link to the MP3 that was uploaded. π