As both a movie lover and a Xennial, I still (unashamedly) send a lot of video clips and gifs when texting with friends.
If nothing apt comes up immediately, there’s a couple of sites I use where I can enter any phrase and immediately get a clip of it being said in various films and TV shows: PlayPhrase.me and YARN.
If this is something you like to do, too, then these are pretty useful web apps to have in your bookmarks.