Moves to fix improper data-sharing with advertisers have cost platforms millions in ad dollars.
Blanket ban comes at time when China's influence over social app is coming to light.
Platform is keen to attract more advertising from entertainment companies.
Social media giant has begun tests on hiding count in Android app.
CEO Susan Wojcicki has defended right of people to upload content 'outside the mainstream', but set out how platform is
New ad format applies for videos that are 15 seconds or less.
Social video site known for lip-syncing uploads chooses Omnicom for global media planning and buying outside of China.
Total number of posts with #ad is forecast to break three-million barrier for first time.
FTC confirms $5bn Facebook fine, criticises the company's 'deceptive' behaviour, and announces it is suing Cambridge Analytica.
Social platform is going after brands' lucrative sporting event budgets.