No one here is even trying to advance narrative high school boys are angels, with a bit a of digging it's pretty easy to find things that Covington Catholic does may well deserve the level of public shaming that this story got.
However in this case, the entire narrative has been pretty widely disputed, Caitlin Flanagan does it much more elegantly than I could.
https://www.theatlantic.com/ideas/archive/2019/01/media-must...
As for the source, why not go to the original, like any responsible journalist should have, copy of the full video: https://www.youtube.com/watch?v=QwNyOD8FIQk
Feel free to tell me when you hear them chanting "Build a wall", I haven't heard it.
The first widely reported, and easily proven incorrect fact is that Nathan Phillips is a Vietnam Veteran, see fairly through coverage of that here:
https://www.businessinsider.com/native-elder-nathan-phillips...
So really you're asking me to believe the narrative of someone who is proven to be lying about his military service, with no corroborating video of his claims, which just seems a bit ludicrous.
edited: spelling