"beginning scene" is correct and usable in written English.
It can be used to refer to the first scene of a play, book, movie, etc. For example, "The opening of the play includes a touching beginning scene that captures the audience's attention."
We were telling ghost stories, and I played the beginning scene from this exorcism film, where this possessed grandmother or whoever is speaking in Latin.
The beginning scene in "Who Guards the Guards?", where Mace and Khordad meet in Hebron, was filmed on a roof garden in below zero temperatures; however, McInnerny and Paul Bhattacharjee wore summer clothes.
The beginning scene of the episode, in which Marge, Lisa, and Bart watch a home video, is a parody of the television series The Wonder Years; the Joe Cocker version of the song "With a Little Help from My Friends" from that series is also used in the background of the opening scene.
Emma: I thought that whole beginning scene was actually really sweet.
In the beginning scene of season 1 finale episode 6, titled, "Hand of Five Poisons," Sunny rides his motorcycle up to the docks to meet The River King.
Actor John Noble called the beginning scene with Olivia and Walter naked "the funniest thing" yet, explaining "The writers keep throwing challenges at me, because I never say no.
As the music begins, scenes of them dancing and Carey entering the movie projection room inter-cut.
Clean up everything and begin setting up the scene.
From the beginning, scenes veer back and forth in a shifting time frame.
The beginning scenes are lucid and peculiar, but as the play's three acts progress they become increasingly preposterous, building to door-slamming farce one moment and then flashing back to Nazi horrors the next.
The beginning scenes of the girls' delinquent behavior really does make them seem... bad.
