From Youtuber Spumwack:
Science and videogames! Together!
Minecraft can be a great tool for visualizing complicated subjects, such as the speed of light (aka “c”). Using a straight track and simple math, we can see how the universe might be limiting speeds for very fast things, such as light.
The “doors” metaphor is admittedly, imperfect. While they do limit speed outside of “acceleration”, they falsely imply that there is something “in space” that slows things down, which does not appear to be the case at the moment. The actual mechanisms that limit objects to light speed will be the topic for a future video. (Hint: It has to do with time!)