There are recordings, and video of some his live performances.

  Lemi Ghariokwu, a renowned Nigerian artist and the designer behind 26 of Fela’s iconic album covers, says the fact that this is the first time an African musician gets this honour “just shows that whatever we as Africans need to do, we need to do it five times more.”

Fela Kuti & Africa 70 (Berlin 1978): https://www.youtube.com/watch?v=kr8oRpA2SpE

What withered a little on the vine was his philosophy of pan-africanism.

> all we really have are people’s recollections of him.

His children, former band members (he had big ensembles) are still performing his compositions and in his style.

eg: Seun Kuti performing a Fela Kuti number along with Newen Afrobeat: https://www.youtube.com/watch?v=mFSRCG4DrmI

He's still relevant today, he dedicated an entire album to faceless armed thugs operating as state sponsered death squads.

* https://en.wikipedia.org/wiki/Zombie_(album)

  The album was a scathing attack on Nigerian soldiers using the zombie metaphor to describe the methods of the Nigerian military. The album was a smash hit with the people and infuriated the government, setting off a vicious attack against the Kalakuta Republic (a commune that Kuti had established in Nigeria), during which one thousand soldiers attacked the commune.

* https://www.youtube.com/watch?v=Qj5x6pbJMyU

Fela Kuti First African to Get Grammys Lifetime Achievement Award