Hi.
I had imported the START Pack in a previous video.
When I downloaded and installed Blender, I could not ‘drag’ the bowling pin onto the scene and the Icon in assets was still just a blank white page of an unrecognised format.
I trried exiting Unity and going back in, but that did not resolve the issue. What did work was right clicking the “START Pack” in the assets folder and selecting the option Reimport. There was a brief reimportation dialog, but then the Bowling Pin mesh looked as your video describes it and was draggable into the Scene.
OS: Mac El Capitan 10.11.6
Unity Version: 5.4.4
Blender Version: 2.78b
Hope this helps other students