Looking for a Gallery app which has live thumbnails and password protection.

As the title suggest i'm looking for a gallery app that has live thumbnails which plays animated media , (Like gifs ,mp4,webm).
I flashed a rom and has a gallery that does that,but that gallery has no options at all ,except from sharing.
I also cant find the name of the app in case there is an update somewhere out and there is an update to it.
The gallery app basically does this: https://vid.me/zXqY and i want something similar with locking function.