Texting and emailing photos and videos from your iPhone can be a pain. In the newest version of iPhone operating system, IOS 12, there is a feature call iCloud link, which allows you to send photos and videos from your iPhone in a iCloud link. This is very useful for sending groups of photos or video files.
How does it work? Simply select a photo or video (or a group of photos or videos), then tap the Share button. You will then notice a new button in the bottom titled Copy iCloud Link. Click on that and a link will be placed in a text message or email. (Note: make sure iCloud Photos is enabled in the settings.)