Change default of selection in upload form?

[Bidsl]

I have several different formats of video allowed. When the upload video form opens, it has every type of video checked by default. For example,

.wmv
.mp4
.avi
shipped

all of these formats are selected by default on the form. My users will typically be uploading only one format so they have to go through and uncheck/unselect all of the formats that they are not uploading. It would be much simpler if none were selected by default, and the user then just selects the one format they will be uploading.

How do I change this so that none are selected? I figure it must be in the database, but I can't find the table that controls this.

[Bidsl]

Figured this out.

In case anyone is looking to do this in the future, the box is set to checked in admin/functions/upload.php

I just removed "checked" in the code and it had my desired effect.