Well that is the answer i am looking for.
Thankyou jenee, i was not aware of that.
EDIT: I just checked the website and it says FREE VERSION "DaVinci Resolve 12.5 is the world’s most advanced editing and color grading system for independent users working on SD, HD and *Ultra HD* projects"
I needed to read the fine print i thinks.
So it must have limitations built in that obviously i dont understand.
I dont think the value is there for $475 so i guess its back to PP.
MP4 and MOV is a video container format which may include the Davinci unsupported video or audio codec
In this case, it is better to convert it to Davinci more supported video format with the help of iDealshare VideoGo.