Google randomly opens up on my phone?

I have an HTC 626 Desire (android). It (Google App) usually only opens up on YouTube. I close the Google App and go back to YouTube and sometimes it opens up IMMEDIATELY to where I don't even have time to press the play button on my video. I thought maybe Google thought the YouTube videos were saying OK Google but I have my settings set to where it will only open if you click on it and then say OK Google. Please help, it's getting annoying and I don't wanna have to uninstall it.

?2016-08-09T17:46:07Z

2

Anonymous2016-07-21T19:07:16Z

You're hacked.