Shakespeare at the BBC: The BBC Television Shakespeare on YouTube.

At the beginning of this month, BBC Worldwide began uploading archive television to its YouTube channel which includes samples from the BBC Shakespeare collection.  So far there are seven plays, all complete:

As You Like It

The Tempest

Hamlet

Macbeth

Julius Caesar

The Merchant of Venice

Othello

The Wikipedia has a typically voluminous article with cast lists and background to the series. The rest of BBC Worldwide's uploads are here, whole series of documentaries and dramas including Terry Jones's Medieval Lives.