It is a set phrase: behind the scenes. You can't use the singular in this phrase.
١٧ يونيو ٢٠٢٤
0
3
3
Behind the scenes
١٧ يونيو ٢٠٢٤
0
3
3
Behind the scenes (plural) 😊
١٧ يونيو ٢٠٢٤
0
3
2
The correct phrase is "behind the scenes." Even if it's a short clip, "scenes" is the standard term used.
So, your caption should be:
"Behind the scenes"