Redgif links all show as “failed to load media” both in the feed and when viewing the post. The only way to view the these links is to leave the app and open the post in a browser.
I remember they worked for a while so perhaps Voyager just needs a new API key or something.
Works for me if I click the thumbnail from ‘all’; fails if I go to the post.
Not just redgifs (iirc) either so probably a video thing rather than an NSFW related thing.