The way I would do it is to create a class which held one row's worth of information, and override the ToString implementation to return just the information I wanted. Then when you use the ComboBox.SelectedItem property, you just cast it to the appropriate type:
Video video = myComboBox.SelectedItem as Video;
if (video != null)
{
Console.WriteLine("{0}:{1}", video.Id, video.Title);
}