Silbury Dig: The Heart of the Mound.
BBC 2 Chronicle Series.
First Broadcast 27 July 1968.
Duration 39 minutes 12 seconds.
"Silbury is one of the largest prehistoric earthworks in Europe, possibly dating to 2400BC. In this programme, originally broadcast live, Magnus Magnusson meets the archaeologists who have uncovered a tunnel that leads into the heart of the mound."
Channel 4 News. 24 Oct 2007.
Duration 4 minutes 31 seconds.
http://www.channel4.com/player/v2/player.jsp?showId=9817
The Hill with a Hole (or The Silbury Hill Conservation Project).
English Heritage. 10 June 2010.
Duration 9 minutes 5 seconds.
"A film produced by Chris Corden Productions for English Heritage that includes work taking place within the re-opened 1849/1968/69 tunnels at Silbury Hill."
http://www.youtube.com/watch?v=LxkXdK2hcs4
See also -
http://www.youtube.com/watch?v=kVxKI0bKdk4