I think your thesis would be more correctly stated if you were to say, “A lack of social knowledge has led to a lack of values in our society.”
There used to be an emphasis placed on teaching things like etiquette and manners, those are social tools which allow a society to function more smoothly. Etiquette defines basic rules that help people with different backgrounds and viewpoints to get along.
When people stopped being taught basic social skills, our culture started becoming much more self centered. This social self centeredness has in large part led to the lack of values you are refering to.
Just an opinion. Hope it might help some. :)
Maybe working with this thesis, your video could show strangers treating each other with polite respect. Things like holding a door for someone, saying thankyou, etc. and show how doing things like this helps foster and strengthen a sense of values.
Then show the same situations where people are rude and obnoxious. Ignoring someone is behind you when you let loose a door, saying “what are you looking at” to strangers on the street, demanding respect of others without showing any respect in return, etc. to show how the more people act like that, the easier it is to forget other values as well.