Have fun 
Or…
Retail:
https://www.curseforge.com/wow/addons/leatrix-plus
Classic:
https://www.curseforge.com/wow/addons/leatrix-plus-classic
Click the blue lightning icon on the minimap
Retail: Go to Media->Various->Cinematics->Choose a Cinematic
Classic: Go to Media->Movies->Choose a Cinematic