Heads up,
If you've an account with google that gives you access to its page creator services you can convert movies to 3gp using free software here -
http://www.nurs.or.jp/%7Ecalcium/3gpp/3GP_Converter034.zip
and upload your 3gp to your google page creator account.
soon its uploaded, right click it and select 'copy link location'
paste the URL of the file in your land's media panel and hit play
Notes - mp4 can be converted to 3gp and played in the same way but in the movie, not the music URL section of your media panel.
3gp files are tiny and so the quality is not great, its fast to stream though! Footage recorded in second life at full frame rate came out quite well after the conversion and upload and the process takes less than three minutes from stopping recording to watching the same footage in world. : )
like all the best things in life - its free of charge!
Goapinoa