(No code need, just show me the way) On trigger enter, press key (or hold) to play cutscene

Hello guys, Im trying to make a FirstPersonPlayer be near an object then press some key that appear in screen (for interaction with a object) then it runs a Cutscene, after X seconds it back to COntrolThePlayer again. . . This is a video example in 12:18 https://www.youtube.com/watch?v=cUCbtpMkZQM . . I was thinking about, when press key, you change scene ( a clone scene with a animation) then after it the timer script makes the scene change again to the last position (but is a 3° scene already). but if a put 10 interactions in the game, it will be needed 30 scenes lol, do you guys have a more easy and practical solution?