When I followed the link to Vimeo, I saw the CC licenses listed and the number of videos in each category.  I clicked on the “Browse all 557K videos” link under the Attribution License.  Then I did a search for geysers (5th grade social studies topic).  I was surprised when a video made by the Montana Office of Tourism came up.  I looked for the license to verify this video has an Attribution License, but I couldn’t find anything.  Next I tried an advanced search.  This allowed me to select the license from a drop down menu.   I got very different results:  0 videos with an attribution license.  It appears that doing an advanced search is a way to be sure a video has the CC license you are looking for.  Does anyone have an alternative way to search by topic and license in Vimeo?