I used to use my phone, which had great quality video, but the problem I ran into was running out of space which really limited how long I could film for, so I felt rushed while filming. I also found it difficult to know when a video was focused, because I wasn't able to see the screen. (I used the back camera because it gets WAY better quality than the front camera.) I know there is a way to give your phone a viewfinder (you can like connect to another device with Bluetooth or something) but I've found it a lot simpler to just use a normal camera. Another thing I prefer about having a camera is having a SD card that I can just put into my computer, instead of connecting my phone with a USB cord.