I just came across this site:
BBC NEWS | Video and Audio
It looks like a good source of ... well, most things! If it doesn't work for you, go back to BBC NEWS | News Front Page and click on the appropriate tab; I suspect the link I've given is tailored in some way to my internet connection (broadband).
[Incidentally, don't be confused by this week's rash of Liberal Democrat leadership coverage, the leader who's just resigned is Sir Menzies Campbell, but "Menzies" is an originally Scottish name that - for reasons I couldn't begin to explain - is pronounced /'mɪɲəs/; he is known to his friends as 'Ming' and to political observers as 'Sir Ming'.]