How Do I Post to Multiple Groups on Facebook?
To share a video to multiple groups at once on Facebook, you’ll have to be the admin of every group you plan to forward the video to. If you are the admin of every group, you can use a tool such as PostCron to post to multiple groups at once. Here’s how.
Can I Share to More Than One Group at a Time On Facebook?
This is possible to do by using third-party apps such as the one outlined above. However, you need to make sure you are only posting to groups you are an admin of. If you post to multiple groups at once that you don’t admin, that would be in violation of Facebook’s Terms of Service. If you use a third-party app to do this, you could possibly get your account suspended. That’s why it’s important to be sure you’re only mass-posting to groups of which you’re an admin. In that case, feel free to post to as many of your groups as you want. To share a post to groups you don’t admin, you’ll have to do it one at a time using the Share function on the post itself.