YouTube CEO Susan Wojcicki has said she remains “optimistic” about YouTube’s long-awaited subscription service, although she avoided answering whether it will be launched before the end of the year.

Speaking yesterday (Monday, October 27) at the Code/Mobile conference, Wojcicki said that YouTube is “working on it”.

The CEO added: “I think there's a lot of opportunity. It's amazing how much music we have…I remain optimistic that you can see it soon."

The music video streaming service was first rumoured to ...