Sorry you're experiencing issues streaming on the laptop. Given that it works fine on other devices, troubleshooting should be focused towards the computer that has the issue streaming.
The first thing I notice is that the computer is running OS 10.7.5. That is no longer an operating system that our plugin supports. I would first consider upgrading the OS to 10.9 (Mavericks) or 10.10 (Yosemite).
Also, I would make sure the browser doesn't have any updates as well. If the browser version is out of date, it is also known to cause this kind of issue.
Here is an article depicting which version browsers are supported with which operating systems:
Hope this helps!