There are more up now, including two great Welch/Weston era performances!
Miles Away (1973)
https://youtu.be/jJTFzvMPFa4
Believe Me (1973)
https://youtu.be/3zC2XQP3QqM
Rhiannon (1976)
https://youtu.be/goKM7jsOwrg
And then the remainder are the same performances from the Rosebud film.
Go Your Own Way (1977)
https://youtu.be/iBNOm2cfntQ
You Make Loving Fun (1977)
https://youtu.be/sCTsQMA1PnA