alt Hacker Newsi think it's a reupload of this: https://en.wikipedia.org/wiki/File:Thomas_Edison,_Panorama_o...
which links to https://lccn.loc.gov/00694271 , but that does not seem to have a digital copy available
edit: well here's an archive but it's not any better https://web.archive.org/web/20231016184047if_/http://memory....
At 5m39s of https://en.wikipedia.org/wiki/File:1900_-_The_Paris_Expositi... is a higher quality view of the walkway (plus thirty minutes of other sights to behold from that World's Fair).
7m20s of the same video clip features a clip shot of riders on the overhead converyor/walkway.
[the original film was silent, audio is faked]