Improved reliability of undefined check in `updateVideo` Using `typeof` to check for undefined prevents `ReferenceError`s and people tampering with the value of `window.undefined`
Improved reliability of undefined check in `updateVideo`
Using `typeof` to check for undefined prevents `ReferenceError`s and people tampering with the value of `window.undefined`

compedit/react-youtube,troybetz/react-youtube,troybetz/react-youtube,compedit/react-youtube