Twitter has a new-ish feature that lets you embed only the video from another post or tweet in a post/tweet of your own (without quote-replying the source tweet itself). Only the video is then embedded in your post, and a small attribution appears at the bottom identifying where the video came from:
In the screenshot above, Sarah is sharing a video that was originally shared by Luc, but she’s not embedding/quoting Luc’s tweet itself – only the video. This post will cover how to do that yourself, both on the desktop/web and in the iOS Twitter app on iPhone.