See how to create a transparent html5 video without Flash that also works on iPhone. Achieve a very nice professionally looking effect on any device.
Test yourself what is the best CDN(content delivery network) online and compare your results with others.
Article shows how to choose video encoding format to have a single version of a file playable on every device out there. A working ffmpeg example including to encode to baseline H264 AAC in mp4 container
Alternative to Flash: how to replace Flash banners with animated scalable graphics that work on mobile devices