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In Features, third bullet something was missing:

Multi-track format allows interleaving of video and

I guessed 'audio' was the missing word and added it, but if anyone knows a better completion of the sentence, then please correct my guess. --Claus chr 22 November 2009

I'll put this on my to-do list - it must be possible to find a clue from browsing the linked sites - after all, that was where I got the info in the first place. I might well be 'sound', but then it could also be video and stills. I'm not convinced that I'd have used the work 'interleaving' if it had been audio. (That's the problem when something interrupts your work :-) ) --annew 12:14, 22 November 2009 (UTC)