If you have the first version of Launchpad controller for Ableton Live and trying to find out, how to use it, below six quick video tutorials originally from Novation TV.
Launchpad Tutorial: Part 1 — Setting Up
https://www.youtube.com/watch?v=rXqBBBjgh_0
Launchpad Tutorial: Part 2 — Session Mode
https://www.youtube.com/watch?v=3aX-7jmYJJU
Launchpad Tutorial: Part 3 — Mixer Mode
https://www.youtube.com/watch?v=2pQ2f_T6K3g
Launchpad Tutorial: Part 4 — User Modes
https://www.youtube.com/watch?v=oEhsEu3NnLM
Launchpad Tutorial: Part 5 — Using Multiple Controllers
https://www.youtube.com/watch?v=ibEMMft6BDY
Launchpad Tutorial: Part 6 — Using Launchpad with Automap
https://www.youtube.com/watch?v=rQllvgohTC8