What are some alternatives?
When comparing Mass Instagram Video Downloader and 4K Stogram, you can also consider the following products
GramPhotoz.com - View & Download Full Size Instagram User Pictures
VideoTagz.com - Search Instagram Videos by Hashtag
Downloadagram - Official Instagram photo and video downloader.
Insta Dp - With InstaDp you can view instagram profile picture for free in full(original) size and download it right away.
Save-o-gram - Start saving your favorite Instagram photos and videos!
Storiesig - Instagram Stories Download