Why is my YouTube sound wonky

[AC Question]

When I play any video on YouTube ever since I downloaded the system update today(September 22,2015) the sound has been wonky
The word would be said
Then the persons lips would move saying that same word after it
Please help

 

[B. Diddy]

Welcome to Android Central! Which device? Try going to Settings>Apps>All​, select YouTube, and Clear Cache/Clear Data, then Force Stop. Now try again.