Albert Einstein (02) | 0:49: Probably from circa 1930. This may have been when Einstein's discussion with Edwin Hubble (1889--1953) and others at Caltech led to his abandonment of the cosmological constant and the Einstein universe. The newsreel says this is a return visit, and so maybe this was after the abandonment. Not too interesting, but short enough for the classroom.
E=mc**2: Einstein explains his famous formula | 0:57: Albert Einstein (1879--1955) explains it all for you. Our master's voice. NOT suitable for the classroom.
The Accelerating Universe: Einstein's Blunder Undone | 1:10:03: Bob Kirshner (1949--) gives a lecture in honor of Hans Behte (1906--2005). Mostly off the topic mostly and far too long for the classroom.