Open the Facebook app on your Android or iPhone device and log into your account, if you haven't logged in already.

Tap the three lines icon, then scroll down and tap Settings & Privacy.

Next, tap Settings.

Scroll down to Your Information section and tap Activity Log .

Scroll down again and tap on Logged actions and other activity to expand the menu list, then tap Videos you've watched.

To remove any video from the watch history page, tap the three dots icon next to it, then tap Delete at the bottom.

To clear all Facebook watch history at once, tap on Clear video watch history as shown below.

Once you tap on Clear video watch history, you'll see a notification at bottom that says "We have started clearing your video watch history. if your video watch history is long, it may take some time to clear".

Finally, refresh the page to see the change. To do so, close and re-open the Facebook app or tap the top left arrow then select Videos you've watched. Once you do that, you should see an empty page with No items

To begin, log into your Facebook account, if you haven't logged in already.

Click the down arrow at the top right of any Facebook page, click Settings & Privacy, then click Activity Log.

In the left side of your activity log page and under Activity types, scroll down to the bottom and click on Logged actions and other activity.

Next, scroll down and select Videos You've Watched.

Now, you should see a list of all your past watched videos. If you want to delete a specific watched video, click on the three-dots icon next to it, then click Delete.

To delete all watched videos at once, click Clear Video Watch History link.

In the popup window that appears, click Clear Videos Watch History.