A movement from Poglietti's "Toccatina sopra la Ribellione di Hungheria" and a fugue by Kerll. The description of the video mentions:

Those familiar with Johann Kaspar Kerll are likely wondering why a work of his is in the latter half of the piece?

The album this recording originated from was put together as an attempt to show off a bunch of baroque pieces with wide texture variety, most of which were chamber works aside from this one solo harpsichord recording. These two works were put together as complimentary/creative efforts to form a full varied piece, Poglietti being the first half and Kerll the second half. It is also worth noting that Alessandro Poglietti and Johann Kaspar Kerll were very close acquaintances and friends.