Originally Posted by cryptie

H.264 pretty much replaced vp6, I say pretty much because development on vp6 still continues with vp6HD.

I'd go with H264

technically, you CAN encode a .mov with H.264, rename it and load it in a flash player, but it's not the PROPER way to do it.

I encode them with FFMPEG server side.

I'm still playing with flags though.