John Gruber on why he refuses to embed Flash on his site:

As for why I refuse to embed Flash, let me put it this way. I use and highly recommend ClickToFlash, which blocks all Flash content by default. Why would I publish content using a technology that I personally block by default? I truly hope to see Flash fade as the de facto standard for embedded web video, and I’m willing to put my markup where my mouth is.

I am an avid ClickToFlash user as well and until recently thought the internet was for pr0n text. It would be nice to be able to embed H.264 videos from Youtube.

Why Gruber Refuses to Embed Flash