Brainstorming

• Thumbnail extraction definitely happens in the backend.
  • But when does it happen?
  • Only when creating the post?
  • Or also when federating a post to a new instance?
  • PR which replaced iframely ➡ https://github.com/LemmyNet/lemmy/pull/1706
  • Now backend uses fetch_site_metadata ➡ https://github.com/LemmyNet/lemmy/blob/main/crates/api_common/src/request.rs
  • … whenever a post is created or updated
• Thumbnails do neither work on lemmy.wtf nor lemmy.world but work on feddit.de
  • Does feddit.de extract the missing thumbnail when creating/updating the post?
  • Or does it expect the thumbnail to be transmitted alongside the post?
• lemmy.world does not use cloudflare (I think) but they are also (like lemmy.wtf) using docker (I think)

Also Not Working on lemmy.world

• https://lemmy.world/c/music

But does on feddit.de

• https://feddit.de/c/music@lemmy.world

It’s not only YT thumbnails which aren’t shown. This is your post about the free 24 slot bag as shown on lemmy.wtf (no thumbnail), lemmy.world (no thumbnail) and feddit.de (with thumbnail):

• https://lemmy.wtf/post/452
• https://lemmy.world/post/78622
• https://feddit.de/post/809185