Open facebook app in your smartphone.
If you want to save post or video then at the top right corner of the post there are three dots vertically aligned.
![](https://cleartalking.com/main/qa/?qa=blob&qa_blobid=17312660668322082062)
Now it will ask you for different options. You have to choose the first option i.e. Save Video
![](https://cleartalking.com/main/qa/?qa=blob&qa_blobid=11590531659539008042)
Finally your video will be saved in the app without using any third party app.