I've started using Vimeo as an option for viewing my videos. I've never had a problem until someone who's using a Mac told me they cant watch this, http://www.vimeo.com/11157547
They can, however, watch some of the others I've upoaded. I thought Vimeo converted all videos to the same codec no matter what is uploaded. Can someone shed some light on this for me?
I usually make my videos using H.264/.mov .