The addition of a live streaming option to YouTube's  (GOOGL)  app helped push it to the top of Apple's  (AAPL)  App store, the first time it has held that position since December 2015, TechCrunch reported. 

YouTube already offered a live streaming option for users with 10,000 subscribers or more, but relaxed those restriction this week to allow users with 1,000 subscribers the live streaming option. 

(What will move markets this quarter and how should investors position themselves ahead of time? Jim Cramer sat down with four of TheStreet's top columnists recently to get their views. Click here to listen to his latest Trading Strategies roundtable with them and read their advice for stocks, bonds, forex and gold.)

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