Safe Gallery is a good solution designed for people interested in protecting galleries of photos and videos using passwords or patterns. Inside the intuitive interface you can easily pick the exact items you want to label as private and which ones to stay unprotected. As a lock you can pick between passwords, PINs, fingerprint or pattern. All your safe galleries of videos and photos can be accessed inside different sections of the interface.
Another great feature is the ability to protect audio files, as well. Each time you want to delete any of your safe galleries, please remember to unlock all the protected media content before you delete the actual gallery. If you fail to do this, you might delete the protected items at the same time. Also, pay attention when using tools that handle cleaning on your Android device, because they might be able to remove locked media content.