This topic might have a better name.
This is called Strax Field Report: Doctor at Trafalgar Square on YouTube.
Talk about it here.
Strax Field Report: Doctor at Trafalgar Square was the first Strax Field Report webcast. It was released during filming of TV:The Day of the Doctor.
Synopsis
Field Report 1805/T: The Doctor has been sighted at the squalid human colony known as 'London'. Specifically, in 'Trafalgar Square'."
Plot
Strax reports to Sontar that the Doctor has been sighted in Trafalgar Square, "a place commemorating a long ago sea-born battle including columns, 'a sun, gigantic metal lions and flying predators called pigeons." Stating that, despite these forces, the English were unable to obliterate the French, Strax gives the Sontaran salute and ends the report.