initially, i didn't use dailybooth because i couldn't seem to get my macbook pro to work with the application. as it turns out, the founder told me there's a hack if you're on a mac:
1) click allow when the flash permission screen comes up
2) right click -> click settings
3) click the "webcam" tab icon (should be the last one at the bottom)
4) under the drop down menu, select "USB Video Class Video"