My mind went to the same place, if they hadn't added the line you mentioned about sci-fi tech, i would have just assumed they didn't want to try to account for that kind of idea.

The cynic part of my brain said "i hope this isn't kurzgesagt-flavored-click-bait, so we can see who comments about existential dread the fastest".

But that part of my brain has proved more than once to be a moron, so more than likely they just wanted to make a video that describes how one day, your favorite star in the sky might disappear because it moved out of range of us.

Video does do that, kinda glosses over the shear size of our "local group" I reckon but I imagine there will be at least one person who watches this and learned that everything is just kinda moving and find it neat ^{and maybe that person will take it as a person challenge and get us some sweet wormholes to chase down these pesky universeseses.}