I just wonder why the majority of html5/flash players (http://praegnanz.de/html5video/) still suggest/support .flv as a fallback format.
The new regime requests the following in at least 3 different bandwidths (mobile, standard, HD) each:
* MP4 (h.264 Main Profile w/AAC audio) * OGG (Theora with Vorbis or MP3 audio) * WEBM (WebM with Vorbis audio)
This is from memory, so I could be mistaken about the specific codecs used for those last two, but those three file types combined with a player (or JS library) that detects bandwidth capabilities should let you play a video back on virtually any modern device (ie. most phones, tablets and browsers), and fall back to Flash using MP4 for browsers without HTML5 video element support.
I've used VideoJS and JWPlayer in the past (and recently!) with great success. There is no need for an FLV version of the video unless you expect your users to be using Flash before version 9 (or was it 8?).