Joke Collection Website - Mood Talk - Excuse me, how is this special effect of changing face realized in PR?

Excuse me, how is this special effect of changing face realized in PR?

Different photos, just between two photos, transition effect, gradient effect,

It switches automatically and slowly. Have a professional transition effect-add it to the middle joint of two photos.

The two video materials I prepared for the premiere sequence, please note, must be two video materials to add transition effect and transition effect.

The next step is to find the menu about "video transition" in the effect (usually the last side).