I was not familiar with the Indian Act in Canada, so I just did a brief read through via Wiki. It seems it's still in force, although there have been some amendments since the period I assume the video was taken.
The video does detail some obvious actions required to bring change. It also details how to manipulate people both in the cause, and outside of the cause, which certainly brings into focus the methodology of lies and deceit that Alinsky's ideas require.
What it seems to suggest is the complaints and talking points being used today on a number of fronts are certainly not organic, not do they necessarily echo the actual will of the people on specific issues. What the video would seem to reflect is the will of a select inner circle, who use causes and susceptible people to achieve their goals.