Help with Advertising Code

[alfuzzy]

Hello all you experts out there.

I'm working with a new advertising partner...and they provided me with some ad code for a video advertisement. Problem is...the video ad code doesn't seem to include any sizing information...so the video will play full size in whatever window size the browser is running. The larger the browser window...the larger the video ad...the smaller the window...the smaller the window the video will play in. No matter what size the browser window is...this video ad will play full-size in that window.

I would like the video to play at a fixed size (let's say 700px wide)...no matter what size browser window is being used by the user.

Here's the ad code I've been provided...can someone take a look at it...and please modify it with some code that will force it to run in a fixed size window (700px wide for example)...or please let me know what & where some code needs to be added so it runs in a fixed size window.

<script>
(function (d,s,n,id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) return;
js = d.createElement(s);
js.id = id;
js.className = n;
js.src = "https://stream.xyz.com/embed/sdk.js?embedId=333cf05e-c1be-499e-53a2-1234c311fe7d";
fjs.parentNode.insertBefore(js, fjs);
}(document,'script?,?xyz-stream','stream-sdk-jssdk_xyz.com'));
</script>
<div id=?333cf05e-c1be-499e-53a2-1234c311fe7d"></div>

Thanks very much.