This is just an extra information injected in PeerTube HTML that is required by Twitter/X. If you don't have a Twitter/X account, just leave the default value.
Manage <x id="START_LINK" ctype="x-a" equiv-text="<a routerLink="/admin/users">"/>users<x id="CLOSE_LINK" ctype="x-a" equiv-text="</a> "/> to build a moderation team.
With <x id="START_TAG_STRONG" ctype="x-strong" equiv-text="<strong>"/>Do not list<x id="CLOSE_TAG_STRONG" ctype="x-strong" equiv-text="</strong>"/> or <x id="START_TAG_STRONG" ctype="x-strong" equiv-text="<strong>"/>Blur thumbnails<x id="CLOSE_TAG_STRONG" ctype="x-strong" equiv-text="</strong>"/>, a confirmation will be requested to watch the video.
Put your instance on the public PeerTube index: <x id="START_LINK" ctype="x-a" equiv-text="<a href="https://instances.joinpeertube.org/instances">"/>https://instances.joinpeertube.org/instances<x id="CLOSE_LINK" ctype="x-a" equiv-text="</a>"/>