I'll have to dig into this a little more - video is definitely an area we are looking to dive into more and more.
It's interesting to see so many vendors out there using video in their marketing. I've some promos from vidyard and they are attention grabbing which is crucial.
There's a lot of value in tracking video in your attribution model, especially if you have videos tagged by funnel stage!
We use Vidyard at Docker, and use the percentage watched for scoring.