Short form content is typically used in the context of TikTok or IG reels, with videos ranging from 7-15 seconds. One popular method is to use a short (7 sec) sound, with a long piece of text filling the screen. People will to need more time to read the message, which causes the video to loop, and the algorithm to push the video on the FYP more.
This kind of content can be repurposed to Twitter, LinkedIn, and Facebook. YouTube recently came out with a "shorts" feature, that mimics this style as well.