So long as the video is decent quality and you have enough light it will do the trick just fine, you will probably need to record the audio separately and mix it in an editor afterward.
If you want a dedicated cheap ($40) 1080p action camera that works decently in low lighting conditions I can highly recommend the Eken W8 . I’ve been using one as a dash cam mostly for the past 2+ years and the quality is damn good even on dimly lit roads.
Ah right cool, so if you have the audio file from Traktor and the video file on from the phone how do you synch them so they play seamlessly? Thanks again!