Youtube Content Matching & Copyright infringement system
I'm vaguely surprised there hasn't been an article about this (well there may have been, I did a search and it doesn't seem that there has been) given El Reg's interest in the area of Copyright, Google and, abuse of position.
Recently Youtube changed their system so that far more large popular channels (in this case gaming channels) are being flagged for copyright infringement and the supposed copyright holders taking the ad money for those videos (and dragging their feet in responding to objections, and then down right claiming material that isn't theirs.) The youtube reviewers are then hamstrung not only by the automatic matching system that auto flags materials and redirects the revenue to the "copyright holder" but they are also limited to a maximum of 3 disputes at a time, though this is really 2 as if you receive 3 dmca strikes your channel is closed down (even though the DMCA notice is simply part of a legal process and not a confirmation of guilt)
All the while Youtube/Google is still making money from Ads and often companies are illegally gaining revenue off of other peoples copy righted material.
A good set of videos on this come from Angry Joe (one of the people affected by this - also NSFW) but a number of big youtube reviewers have been attacked using the Youtube copyright system.
Angry Joe's videos on his experience
And the example of abuse committed by companies using the flagging mechanism