After I posted my previous post I came to think of something that the old BSF forum had and doing that really speed up the forum considerably.
What Bethesda did at that time was to disallow pictures to be shown as pictures are shown in posts on TWC, instead they allow unlimited links (URL only) for pictures and links to other stuff e.g videos, music, downloads etc.
Another thing that Bethesda also did was to have a post limit of 200 posts for a thread, just to prevent the server to slow down and that helped.
So, why not doing the same thing here as Bethesda did on the old BSF forum.
only URL links is allowed (
here is a thread with a lot of links to pictures and click on the links at the top to show them)
post limit for picture threads, perhaps have a post limit for video threads too
max 5 jpg pictures is allowed for one post and only the jpg format is allowed across the whole forum