Dear Pau Pau,
I think Pinky once told us how we could upload video to YouTube but I cannot find that particular topic now. To share the video,
(1) you can register to YouTube. This website allows you to share video in .AVI, .MOV and .MPG formats. Each video is limited to under 100MB.
(2) Upload your video to YouTube
(3) Make the video as 'public' [it is the easiest way to share it but then everyone can watch that video]
(4) Copy the specific link of your video in YouTube and send the link to your friend or post the link on bk.
Hope you understand what I'm saying. If not, please feel free to contact me.
Happy uploading