John Gruber on setting Safari’s user agent string to Mobile Safari – iPad:
This trick makes video work in Safari on Mac OS X — with no Flash — from Flickr, Vimeo embeds, TED, MSNBC, and probably any other site that offers video that works on the iPad. This doesn’t work for all video, but it should work for any video that works on the iPad.
Very clever and he mentioned this on the last episode of The Talk Show and I have been using that trick ever since, why you ask? I defer to Gruber:
Both Safari and my entire computer as a whole run better today than they did before I uninstalled Flash. Uninstall Flash on your Mac and see for yourself.