Unless this video is a fleet montage, it looks like 2566 is rehab no. 1478. http://www.tbd.com/blogs/tbd-on-foot/2012/02/watch-an-old-metrobus-come-back-to-life-video--14491.html
Cool video. It's interesting to see what happens to buses during rehab.
And for the record, 2566's rehab # is 1492. Looks like the bus next to it is 2512, since that's the match for #1478.