How do I show the avatar of the post author, not the current user?

Hi,

Trying to display the avatar for the user that created the post instead of the current user. Some help?

For reference here’s my code;

<div id=”posts_box”> {exp:channel:entries channel="video"} <!–sub box that centers them–> <div id=”post”>

<div id=”video_title”> {video_title} </div>

<div id=”video”> <iframe title=”YouTube video player” class=”youtube-player” type=”text/html” width=”640” height=”390” src=”{video_url}” frameborder=”0” allowFullScreen></iframe> </div>

<div id=”video_description”> {exp:member:custom_profile_data}{avatar_url} {/exp:member:custom_profile_data}{screen_name}

Playing {game_title}

Published {entry_date format="%F %j, %Y"} </div>

</div>

{/exp:channel:entries}