The first movement of Vivaldi's Concerto in E major (RV 269), "Spring" (from The Four Seasons) performed by the American Baroque.
FAQ

Q: Who are the performers?
A: American Baroque, whose members are Elizabeth Blumenstock (baroque violin), Gonzalo X. Ruiz (baroque oboe), Stephen Schultz (baroque flute), Katherine Shao (harpsichord), and Roy Whelden (viola da gamba). Here is their artist page at Magnatune:

and here is their own web site:


Q: Where can I get this recording?
A: The movement was licensed from Magnatune, where you can listen to or purchase the complete album it came from:


Q: Huh? I thought this was a violin concerto; what are those other instruments?
A: The composition was originally for solo violin and string orchestra; here, it is performed with flute, oboe and violin as soloists.

Q: It's not in E major!
A: Right; it's been transposed to D major (to make it more suitable for flute and oboe).

Q: I hear a harpsichord, but I don't see it; why not?
A: The harpsichord part was not written by Vivaldi, but is improvised by the performer; this animation only shows the notes that are in the score.