Video Recording with DDJ SX2

I am trying to video myself doing some mixing with my Samsung Note 4 Edge phone.  The video is great , however the sound is crap.  I have researched this and it seems that the mic on the phone is not able to get the quality of sound needed.  After looking into other options, there seems to be a line level audio jack but only for the IPhone.  Is there something like this for the Samsung.  I am not able to find it.  And is it possible to do this with the DDJ SX2???

Please help.  Thank you.