For a method that doesn't require third-party sites, you can use the mobile version of the Facebook website on your desktop: Open the video in a new browser tab.
If you want to back up videos you’ve personally uploaded, the process is straightforward on the mobile app. Open the Facebook app and navigate to your . Go to the Videos or Reels section to find your post. Tap the three-dot menu (ellipsis) on the video.
To save public videos or Reels shared by others, you will typically need to use a third-party downloader. Using Online Downloaders (No Install)