Here's another app designed to protect your photos and videos. With Secret Photo Album Hide Photos, you first devise a numeric master password to protect your content. To secure selected photos and videos, you create one or more albums. You then import individual items from your device's library or your computer into that secure album. You can sort your imported photos and videos, search for specific ones by name, and even view a slide show. You can even export selected files to your computer or send them to someone via email or text.
You are also able to view and access your protected photos and videos from your computer using Wi-Fi or a USB connection. And you can back up your secure data to iCloud storage. Finally, you can further secure your content by choosing a folder password, a gesture password, and Touch ID or Face ID. The basic app is free; a version with no ads and unlimited storage will run you $2.99.