What is the possibility of capturing emails for those watching public available videos. it is great to see how many views a movie has had but it would be so useful to know who they were and their contact details
There's no way to do this with Camtasia for Mac at the moment. If you can jump to a PC to produce the .trec file, you can add a quiz to the video which would ask viewers to put in their name and email address.
One thing I've done in the past is embed a Google form next to or below the video (depending on the page layout) that invites users to submit their contact information for follow up, etc.