It’s not particularly vague about what changes are happening either, indicating an upcoming ad-free service:
To give fans more choice we will be launching a new ads-free version of YouTube, available to fans for a monthly fee. This service will create a new source of revenue over time that supplements your advertising revenue. That’s why an overwhelming majority of our partners — representing over 95% of YouTube watchtime — have asked for and signed up for this service.
Furthermore, Recode’s sources suggest that the ad-free service will be bundled with Music Key at the current price of $10 per month, and should launch near the end of October.
Article by TNW.