Junior Alawa

Anyone have any tips on going about making a music video where it's filmed through a mobile phone (snapchat), the idea is to have the whole video in a form of a snapchat video. But i'm stuck on whether on having it filmed on a mobile phone or to use an actual camera?

I'm filming a music video for an artist in a few weeks and i want to start the slow motion sync technique where the character is walking in slow motion but is singing the song in real time example: Coldplay- Yellow https://www.youtube.com/watch?v=yKNxeF4KMsY. I'm quite confuse of the steps to take, can someone enlighten me?

i have been set the task from my tutor to come up with a research question surrounding cinematography. i would love it if someone can give me some ideas to look at cause at the moment my mind is blank.