Check it out here. My phone isn't the most powerful, but it runs with no problems at all. Even in the background.
1) Click start on your phone.
2) Jump on your favourite web browser and type in the URI printed at the bottom of your phone screen.
Personally I found using VLC media player a far better option than using a web browser. Press Ctrl + N and enter the URL in here. e.g. http://172.24.120.167:8080/videofeed
And then BAM! Wireless spy camera. Just hope no one steals your phone.