Greasy Fork

I can't figure out how to get redgifs to autoplay on reddit. Do we need to do more than just replace the word null with true on line 37?

I'm not sure what you mean. That auto-play features is for when you're actually on RedGifs/Gfycat, it's where it automatically plays the next video. It's not "automatically play the current video", as that already happens. I'm not sure why your Redgif videos are not already automatically playing when you view them on Reddit though... they do for me. Could you elaborate on the situation where they aren't?