Jeff Sikes on Nostr: TIL when you upload a video file to Mastodon, it generates a preview thumbnail. The ...

TIL when you upload a video file to Mastodon, it generates a preview thumbnail. The thumbnail isn't passed through to other servers in the ActivityPub payload (similar to preview cards).

Each receiving platform handles this situation differently. Some regenerate a thumbnail (processing again). Some ignore it and don't show one. Others create blank thumbnails to appease the Mastodon API.

A blurhash is passed, tho, and could be used as a placeholder.

#FediDev #Mastodon