Answer: The different possibilities
(video found at a facebook post by Robert Duncan)
Screen captures from the video above.
(this image and following ones from video by Rod Bryanton)
This is a capture of what we see, a 3D representation, a static one. This would be called in cinematography "a frame".
However, in reality we have frames in time, a moving representation, a cinematography (cinema=KINHMA=movement). This would be a 4D representation or "space time".
Multiple frames of space (space time) create a 4D "world line".
What links to the 4D, to space time?
The 5D which would be the different possibilities for events. I could stumble while walking or not. As shown above, I can get married or be single. If I get married, I may have children or my companion may be unwell.
This is similar to what Hawkings said on vertical time.
All above images are from video by Rod Bryanton @10thdim
Different or parallel universes would refers to systems with different conditions and in practice to different possibilities for our life events.
Can we see the different possibilities? World with dinosaurs? Tricky explanation, related to 1 Planck constant and degrees of freedom.
The idea of parallel universes (e.g.with dinosaurs or not) is explained in the video of the same author on the sixth dimension.