It is YouTube's problem to make their business profitable. And hence they will make efforts like what the article says. If things don't work they might require login and enforce ads somehow (YouTube will survive that I think, even if there is some viewership drop). There is no magic wand here that they can figure out (look at competing video services like Vimeo for an example). In the long run in 20 years if YouTube is deemed unprofitable as a whole for the company, it might even be shut down, and nobody might be willing to host another YouTube like service as is without significant changes to monetisation.