Dirac does come up, and it's interesting technology but not suitable for web video, being considerably worse at this task than both Theora and H.264.<p>And no-one, not even the BBC, can guarantee they won't get patent trolled. That's part of the delicious brokenness of patents, you have prove a negative, prove that there are no black swans and while reasonable people will go forward based on probabilities and heuristics, the wider discussion about Theora moved onto politics and business a long time ago, where demanding people prove a negative is a good rhetorical trick even when it applies just as much, if not more, to your own side.