Before I begin, I have to say that this post includes links to an instance, ani.social, that has been defederated from this instance, lemmy.ml, because that's where I discovered this problem.
But in this case, I hope the admins understand that this is worth reporting and investigating, and don't insta-delete this post, because this problem appears to happen with more than that one instance, including sopuli.xyz, which is not defederated from here at lemmy.ml
Let us begin:
With Lemmy account setting “Auto Expand Media” turned on, when I’m viewing community https://ani.social/c/ukraine@sopuli.xyz on my desktop browser, Firefox on Windows, one particular post, https://ani.social/post/1923262 , causes the /c view to ask me to download an .mp4 video from streamable.com:
After declining the download, the space where the thumbnail for the expanded media goes is just blank.
This doesn’t happen when viewing the same /c on .ml https://lemmy.ml/c/ukraine@sopuli.xyz
On .ml, I just get a clickable thumbnail of the video.
It’s just that one post.
On other earlier and later posts of links to streamable.com videos in the same /c, I just get the expected clickable thumbnail.
Maybe some kind of corrupted data as that particular post was transferring over?
When I asked about this on ani.social's meta /c, another user reported the auto-download request on ani.social, sopuli.xyz (the /c's home!) but not on lemmy.ml and lemmy.world