Maaike Boekholt, viola da gamba, and Regina Albanez, theorbo. The video uploader says the piece is Capritio sopra otto figure by Giovanni Battista Vitali (from Vitali’s Partite sopra diverse Sonate?), but I’m not sure that’s correct. Maybe it’s something by Vitali’s teacher, Cazzati?
Is that a cello with frets? I’ve never seen these instruments and I’ve been doing music for 10 years!