I love that this thread is still active. Since my last posting, I have become a die hard fan of BombBomb Video Email - I have an affiliate partnership with them and what is killllller about it is that it will work with ADP and isn't a "hyperlink" or frozen .jpg that I used to preach.
The video email takes the first three seconds of your video and makes a moving .GIF. The customer then clicks it and it plays the video. Super engaging. Grabs your attention.
This is how it works in e-lead, but it is the same in VIN, ADP, ReyRey, Dealersocket...you name it.
http://elisekephart.com/bombbomb-and-e-leads-crm/