If you run PeerTube using Docker, check you run the <x id="START_TAG_CODE" ctype="x-code" equiv-text="<code>"/>reverse-proxy<x id="CLOSE_TAG_CODE" ctype="x-code" equiv-text="</code>"/> with <x id="START_TAG_CODE" ctype="x-code" equiv-text="<code>"/>network_mode: "host"<x id="CLOSE_TAG_CODE" ctype="x-code" equiv-text="</code>"/> (see <x id="START_LINK" ctype="x-a" equiv-text="<a href="https://github.com/Chocobozzz/PeerTube/issues/1643#issuecomment-464789666">"/>issue 1643<x id="CLOSE_LINK" ctype="x-a" equiv-text="</a>"/>)
If your instance is explicitly allowed by Twitter, a video player will be embedded in the Twitter feed on PeerTube video share.<x id="LINE_BREAK" ctype="lb" equiv-text="<br />"/> If the instance is not, we use an image link card that will redirect to your PeerTube instance.<x id="LINE_BREAK" ctype="lb" equiv-text="<br />"/><x id="LINE_BREAK" ctype="lb" equiv-text="<br />"/> Check this checkbox, save the configuration and test with a video URL of your instance (https://example.com/w/blabla) on <x id="START_LINK" ctype="x-a" equiv-text="<a target='_blank' rel='noopener noreferrer' href='https://cards-dev.twitter.com/validator'>"/>https://cards-dev.twitter.com/validator<x id="CLOSE_LINK" ctype="x-a" equiv-text="</a>"/> to see if you instance is allowed.