This video is called Red-rumped Swallow sunbathing and preening on a tree.
Here is another red-rumped swallow video.
From Rare Bird Alert in Britain:
Sunday 20th April 2014
The third Sardinian Warbler for County Cork, and for Ireland, was discovered late morning today, in Scott’s Garden on Dursey Island, where it remained until late evening. Two Red-rumped Swallows spent the afternoon over the Cam Washes at Upware, Cambridgeshire, whilst one also flew over Felixstowe Docks, Suffolk. Two White-billed Divers were off the coast of Lewis, Western Isles and a Ferruginous Duck was on Lough Beg, County Derry.
Lingering rarities included the unringed Red-breasted Goose in Dumfries and Galloway, White-billed Diver in Aberdeenshire, Black Duck in County Mayo and Two-barred Crossbills in Yorkshire and Norfolk (three).