Wow, what a long posting. From what I can see, you have two problems. Let's get started :lol:

1. video_right_single is not the main page. Rather, it's the ad box to the right of the videos (when you click on a video). If you are wanting something on the right hand side of the main page, you want the "home_right_box" ad section.

2. Remember when I was telling you a few weeks ago about the files in the templates_c directory? Remember how I stated that it was a temporary cache directory? That is going to be the reason why when you removed code out of those sections, things started to get whacky. If you add or remove things (especially things that have fixed sizes), it is going to be a good idea to delete the temporary cache version of the template file. Otherwise, what you end up with is a "hole" in your code (for example, a box 180px wide that is blank). If you add something to the video_right_single section and remove part of it, it's still going to be there until the cache directory gets updated. To make your changes show faster, you'll need to delete the copy of your view_video.tpl file in that templates_c directory. Then, refresh the video's page in your browser. Anything that you have added or removed should be visible then.