Just Go and copy the URL of that video which you want to download.
For copying the URL of private account video, you have to use your web browser to do it, first of all you need to do login to INSTA account from any browser which supports INSTAGRAM then open the video and just copy the path from the search bar where the link appears!
Now paste it into the BOX!
Here are the some solid ways that will show how you can use for tons purpose
You can use your smartphone to download Instagram Videos online without installing any app!
Yeah, You can! Use your iPad and android Tablet to save all time favorite clip from using browser!
Always will, this website is absolutely free to use for any purpose!
You can download private account videos