Everytime I try and save on replay mod, the render screen shows up for a few seconds like its supposed to, then just shows the first frame of the video, which i'm pretty sure its NOT supposed to do. Here's a video.
Ok. I do have fast render on, I believe.I suggest trying to disable fast rendering, which can be done by going to options -> video settings -> performance and disabling fast render. After you have disabled it go back into the editor and try rendering it out again.