This is a scheme of what is going on up there:

1. INTRO - 16 bars (drums+bass, then wah wah clav) as a warm-up.

2. SOLO - there are 32 bars for your improvisation.

3. OUTRO - here comes the brass section, reminding that the next loop is coming.

It is all looped 4 times, so you get 8 minutes of enjoyable playing.

Remember to switch on the 720pHD button!

All credits to Herbie.