> Why are so many against the proprietary Flash format but embrace the H.264 codec?
This is the wrong question to me. A more apt comparison is to JPEG or GIF. Considering the work I just did, it's like comparing JPEG to Bitmap—of course I like JPEG better, and its licensing issues have been transparent to me as a developer and end-user.
As a developer, I dislike Flash because:
1. it's slow on my computer
2. it requires another language for client-side development,
3. it breaks how the web "works" (open in new window, back button, etc.)
4. it costs me a developer money as opposed to the browser vendor
If you look at the above list, the web going the way of H.264 has none of these problems. Personally, I'd like a single video format but wish that WebM had come along two years ago instead of causing another transition in video formats.
Why are so many against the proprietary Flash format but embrace the H.264 codec? Google even invested 133 million dollar to buy On2 and offer the world an alternative.