Step 1. First off, you need to download Firefox Web Browser app from the AppStore.. Step 2. Open the Facebook app and Tap Share on any video on your feed or timeline, then Tap Copy Link.. Step 3. Go to slicelive.com, and Paste the Video Link before tapping Download.. Step 4. Tap and Hold on any video format available (HD or SD). Then Tap Download Link and confirm the download. Method 2: Save videos from Facebook via slicelive.com website directly. Download Facebook videos by using the slicelive.com website. Copy the FaceBook video link to the input field of slicelive.com Click the "Download" button on the right. Jun 15, · 2. How to download videos from Facebook using slicelive.com Go to the post with the video you want to download; Right click on the video and select “Copy video URL at current time” Go to slicelive.com; Paste your link there and select the quality of download you need; Finally, right click on that video and hit “Save video as” Name your video Author: Alejandro Rioja. this worked for me. promise What you want to do is, delete the bit that says "mercury/attachments/video/" (replace www. with m.) after opening it in a new tab. Open your messages then find whoever sent you the video and Save Link as the video (should show up as 'random numbers and letter'.mp4).