This is nice. Instead of just a video still, the designers of this site took the opportunity to tell us a little about the video and encourage us to press play. This is a good example of staying on our game, little things like this can go a long way towards accomplishing our strategic goals but opportunities like this can be easy to miss when we are working on larger layout, architecture and interaction parts of the site.
I like that the message sets your expectations for what you are about to see. I would speculate that the quality of the view is much greater if you are prepared or already feeling engaged when you start the video. I also like that the real estate taken up by video player adds some value even if you don't want to watch the video. Just reading the message relays information and strengths brand perception.
Quality of the view is an important metric to measure. The definition will vary depending on the purpose of the video, but understanding what a quality or successful view is, is an important step in creating the interaction and even the content of the video.
Is it successful if they watch 50%? 20%? Turn up the volume? Send to a friend? Watch more than once? Only watch the first 10 seconds but then navigate to exactly the right place in the conversion funnel? Is it a less than quality view if, they finish it then leave the site? Send it to a friend but as a joke? Navigate to a page that takes them further from conversion?
Just something to think about.