embeds

and here are some more:

and

Vimeo (good oEmbed support) • Vimeo staff pick–style example

•	Another common test video

Spotify (track) • Rick Astley – Never Gonna Give You Up

SoundCloud • Rick Astley – Never Gonna Give You Up (various mirrors exist; this one usually works)

TikTok • Popular example format (replace if it 404s; TikTok is volatile)

Twitter / X (expect volatility) • Classic tweet used in embed tests

Bluesky • Public post example

Instagram (static card / link-only for now) • Public post

Truth Social • Public account post (availability varies)