First, click the apple icon on top left corner > Select System Preferences... from the menu. Then click Security & Privacy.



Click Privacy tab.



Click Camera in the lefthand column, then tick the box next to Google Chrome icon. 



A small window will pop up, click Quit Now. By doing so you are allowing Google Chrome to access your camera.



Lastly, click Microphone in the lefthand column, then tick the box next to Google Chrome icon.



A small window will pop up, click Quit Now. By doing so you are allowing Google Chrome to access your microphone.



Now you can reopen PitchVantage in Chrome and start recording videos.