Jubilee.s01p01.480p.web-dl.aac.esub.x264-hdhub4...

External subtitles. The release includes subtitle files (likely English and possibly others) separate from the video. This is useful for accessibility, but pirate subtitles are often out of sync or machine-translated.

ESub in a pirate release often means “someone typed out subtitles roughly and they go out of sync after 20 minutes.” Jubilee.S01P01.480p.WEB-DL.AAC.ESub.x264-HDHub4...

The first episode, titled establishes the central conflict: External subtitles