69% of Ukrainians want to join NATO, according to a June 2017 poll by the Democratic Initiatives Foundation
https://www.reuters.com/article/us-ukraine-nato-idUSKBN19V12V
And that’s what the problem in the Donbass region was, at least according to the video. Basically ethnic Russians fighting ethnic Ukrainians. The government that gained power in 2014 demoted the Russian language as one of the official languages. IDK but the ethnic Russians were probably part of the 31% who didn’t want NATO.
Seems like this type of ethnic tension, especially if the minority perceives itself as being suppressed, is the root of a lot of conflicts. The Balkan Wars of the 1990’s are a great example.