And it's in glorious 432p resolution!

Edit: Here is the 2160p version: https://www.youtube.com/watch?v=UdHnF9Go_DQ

Particularly if you notice all the galaxies above the top of the gas cloud in the final frame.

I wonder how fast an observer would need to be traveling for it to look like that!

99.x% the speed of light, but the image would be blueshifted and highly distorted.

Since the images in the article are from infrared cameras, blue-shifting the light might just land the view from those IR images into the visible spectrum for the observer! Just need to tune the speed correctly.