Can I use JS to change the volume of a video in the html5 video component?

ok all - here was the solution:

setTimeout(function(){ this.diy1embed.volume=.15; }, 200);

a 200ms delay on the volume change gave the component the time to load

I think I am seeing the issue - I am issuing the command: this.diy1embed.volume=.25;   it works in the console but is unavailable in the movie on click or on frame - I believe its a timing issue.