On the Random Photos posts, add links to the pic or video set each picture came from

Most of the time the full gallery/video doesn't exist on the site. Sometimes we go on to feature it in the coming days but at the time of putting it up it's obviously impossible to link to. We could link to the galleries/videos on other sites if they exist but then comes the headache of having to thoroughly check over each site and make sure it's using the images legally, potentially dealing with dead links in the future, etc. There probably isn't a good solution. :/