I get (and, in fact, like it quick much) the idea behind your project, but people are really afraid about their privacy - especially these days. First thing would be adding some information, e.g. that the recording won't be stored anywhere and that it will not be shared. This definitely won't make all of the people trust you, but some will surely feel more comfortable seeing this kind of statement.

I totally understand I didn't foresee it. I added a 'About privacy' section based on your recommendations where I say that not picture is saved or shared, and that the camera is not used without your permission.