User blog comment:SomeoneYouUsedToKnow/SYUTK's Vol.4OP Impressions/Recap/@comment-9090085-20161023022448/@comment-4010415-20161023025752

Actually... SYUTK is wrong about the framerate on both counts.

1. That's not how framerate works. The only reason the action is slower in the opening is because the song is a bit slower, and they wanted it to match the speed of the song. Higher framerate does not slow down what's going on. The only reason that lower framerate appears to speed things up is because it's jumping around.

Basically, you take someone's movement and record it, right? Say, it's a recording of them raising their arm up into the air. At a lower framerate, there are less frames that captured that movement, so if you watch it frame-by-frame, their arm seems to jump from one position to the next. It's like a slideshow. At a higher framerate, more frames captured the movement, so you see a smoother transition of the positioning of the arm as it goes from Point A to Point B. Play both at normal speed, and the person will still move their arm at the same speed, but it looks smoother in the higher framerate version.

The only reason that slow-mo videos use such an incredibly high framerate is because, at a lower framerate, it would look more like a slideshow than a video.

2. I downloaded the opening from Youtube, and it's 24 FPS, just like the rest of RWBY. So, SYUTK's wrong about the higher framerate, it seems.