First of all, it's Eugene, NOT Flynn....
Second of all, he loves Rapunzel, NOT Elsa
Finally, the lighting is terrible!! It cuts from one type of lighting to the other and looks VERY unrealistic!!
1. it doesn't matter wether its flynn or eugene, it says it both in the movie.
2. he's shipping them, not showing a clip from the movie.
3. what do u expect?? having elsa randomly appear in that scene? he was basically just shipping elsa and flynn/eugene. so if u don't like the gif, JUST MOVE ON. u dont need to make this person feel bad.