OK, now dry the tears, take a few deep breaths and put things into perspective.
I haven't watched the entire clip because I was watching while often pausing the clip to do a bot of fact checking.
The first red flag, to me, was the mention of millions of Indians that Columbus and his men killed. I tried to find the figures regarding the population of the Lakota. I am still trying to find anything but millions? I don't know.
Then I decided to research some of the "atrocious quotes" mentioned. An example of one of them is this one, alledgedly by Columbus:
"They would be fine servants. With fifty we could subjugate them all and make them do whatever we want"
I found this: https://skeptics.stackexchange.com/questions/18080/did-christopher-columbus-ever-make-this-statement
There was no hostility towards Columbus and his men but most importantly, this has nothing to do with the American Indians. The phrase comes from Columbus' journals following his first encounter with the Arawak in the Bahamas.
In addition, there is also this about the Dakota people, of which the Lakota is part of. I was going to copy and paste it but feel free to read it. https://en.wikipedia.org/wiki/Dakota_people
What is more important, though is that, like on so many other cases, stuff like this always seem to be trying to amplify events into something that it is not. We have to put it into perspective.
When it comes to genocide we have to look at what genocide is according to the UN.
The United Nations Genocide Convention defines genocide as "acts committed with intent to destroy, in whole or in part, a national, ethnical, racial or religious group" https://en.wikipedia.org/wiki/List_of_genocides_by_death_toll
There is a lot more on the page that the above link leads to. It also includes the UN list of Genocides by death toll and it is this list that, IMO, brings things into perspective.
The list contains 37 listed genocides with the Holocaust, obviously at the top with between 4.9m and 6m Jews only and between 11m and 17m deaths in total. The first American Genocide on the list is Californian Amerindians Genocide in 33rd spot with between 16,000 and 120,000 deaths.
What is more interesting is the stuff above the Californian Genocide. What about the Herero and Namaqua Genocide by the Germans in 28th spot with between 34,000 and 110,000 deaths? What about the seven different Genocides in the USSR? One of them is second on the list behind the Holocaust, i.e. the Holodomor (Ukranian Genocide) with between 1.8m and 7.5m deaths.
Hell, even Australia features on that list in at no 37 for the Tasmanian Genocide with between 400 and 1,000 deaths.
I am by no means rubbishing the genocide of the American Indians. I am just trying to put it into perspective. Never ignore the atrocities but also do not make a mountain out of a mole hill.