There are two different ways to post a Toing to Facebook
Post link – When sharing your Toing (either from the editor or the main Toing options) choose the Share link option that will copy the Toing's link to your clipboard. You can go ahead and paste it in any post.
Post video - when sharing your Toing choose the save to photos option. The Toing will be downloaded as a video to your computer/mobile device. You can then upload the video as a Facebook post or story