Yes, his writing and arranging skills were terrific. His Big Band stuff was good too.... Oddly enough, at around 3:15 of that video, it sounds like the same Bass player in style and sound.
If you listen through headphones you can quite clearly hear it is an Electric played with a pick. Very much the sound and style of that era.
The more you listen to Piero Piccioni, the more you become a fan of his music and start hunting down more of him. His music was very catchy.
It is difficult trying to track down the musicians on his sessions. A few in this link but unfortunately, not the Bassist.
https://rateyourmusic.com/release/album/piero-piccioni/colpo-rovente/