Tom Lehrer on public domain (2020):

https://tomlehrersongs.com/

https://www.amazon.com/Tom-Lehrer-Col...

Use the above link and get the rediscovered and uninterrupted Lehrer TV-performance and The Tom Lehrer Collection from Amazon.
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This film is also available elsewhere on YouTube, but here you get to watch it with the soundtrack restored. Please read this info taken from the Demented Database: "A film of "Pollution", featuring a cartoon of a bird playing a piano at a dump, combined with real scenes of industrial excess from across America, was made in 1966 & 1967 by Astrafilms for the U.S. Communicable Disease Center (not the Environmental Protection Agency as previously reported). The first cut in 1966 featured the live recording of "Pollution" from the LP, but this version of the film was not used. It was then redone in 1967, using more drastic scenes to really drive home the message. Tom and the producers agreed that it would be better to use a studio recording of the song without the audience, so he re-recorded it for the second version. It was then distributed by the National Medical Audio-Visual Center."

The Demented Database is here:
http://dmdb.org/discographies/lehrer....

The remains of the Communicable Disease Center are here:
http://en.wikipedia.org/wiki/Centers_...