When I am on the iMessage dialogue screen with a contact, I can usually click on their name, then Info, and it displays all the video/photo attachments sent in

When I am on the iMessage dialogue screen with a contact, I can usually click on their name, then Info, and it displays all the video/photo attachments sent in that chat. I believe I can then delete them from there. Is that useful? I guess if there's a number of photos you'd like to keep, but not the large videos, it's a more complicated issue.