Adjusting Volume for FLVs

Hey all,

I have a project I am working on, and basically it goes like this, I have flv’s, and I need to put them in a player (online) but I need to do two things, that so far I haven’t figured out how to do.

#1) How do I control the volume of the videos?
#2) How do I show how much of the video has been downloaded

Any help in this would be HUGE.

Christen