Here is the latest information from Facebook on how to post videos to their platform:
https://www.facebook.com/help/1738143323068602/?helpref=hc_fnav
Pro Tip: Be sure to post a link back to the full video or video library on the Facebook post.
For example, if your video is “Title Insurance Explained Visually” then you’d want to include a link back to the page on your website that corresponds with that video.
This is usually something like [yoursite.com]/title-insurance-explained-visually or [yoursite.com]/video-library for a full list of videos.