help me with avatar PLEASE

i have this but its to big for an avatar atleast it is when i convert it to youtube any other video hosts... what video formats can i upload from computer in profile avatar... and can i have a moving avatar???? i also want a continuos link

well if you wanna moving avatar make a picture in .gif try to download some gifcreators i use benetonmoviegif its freeware and easy to use.....

well i just wanted to have my warlord with that lightning stuf around him i thought itd look kinda cool but i just decided id rather not worry about it maybe do it when im done with my media production class so i can achully use flash with a little knowledge about it and stuff