I miss the times when ads were just annoying gifs on the left or right side of a web page. Then they evolved, abusing javascript, to become pop ups that hid the URL bar and opened 3 dozen different pop ups while you didn't close the mother popup. Then they started clickjacking: that close ad button? Just opens another ad. Ad infinitum.
Now, effectively editing the video to add an ad somewhere instead of serving it as a side file. The advertising industry as a whole feels like the absolute worst villains at a personal level, because they want to target you individually.