Have you tried just playing along to it..? It's not hard, just two chords, and it's all about the salsa 'swing' and rhythm, which is best 'felt' rather than written out. An intro (optional...), a first riff then halfway through a second riff, and that's it. On the video, you can see where on the neck the fellow is playing, so just listen to the notes around there and fit them in. Bloomin' good exercise in 'ear-wigging'; highly beneficial. Dancing on the spot optional, but recommended. Try it..?