Drupal 7.x

I am trying to create something that is most likely simple but giving me a hard time. I want to create a page that has at the bottom a grid of video thumbnails. When you click on any of the video thumbnails the actual video appears in a player at the top of the page. So think of it as a news site. When the site loads. You will see the featured news story in the player featured at the top of the page. Underneath the player are other news items that once you click replaces the featured story at the top of page and plays video. 

Installed latest released Advanced Forum module, viewing page site.com/forum gives internal error. The module README doesn't mention which versions of other modules are required. Any ideas?

I need a function or query to return all the taxonomy terms associated with a field on a Content Type.

We have a Content Type of "News" with a field called News Type. 

Taxonomy Type = Taxonomy Term 
Entity Selection Mode = Simple (filter by bundle News Type)

Following the instructions to set-up a multi-site configuration the ERR_TOO_MANY_REDIRECTS error appears while trying to access the INSTALL.PHP file.