Video files v EOS 5D still files

Hi Everyone,
I am a complete novice when it comes to videography but my question is:

I am just getting used to flying my Mavic 2 Pro and taking videos and stills. I have a Canon 5D Mark 111 which I use as a hobbyist taking photos etc. My question is can I merge both files in for example Davinci Resolve (which I am about to download and use) to create a movie. I presume both file formats have to be the same or does Davinci Resolve automatically recognise the difference and compose the video accordingly.
Sorry to seem a little nieve in all of this but I’m sure somebody is a lot more experienced than me in this field. Any help or advice will be greatly appreciated.

should not be a problem

Thanks Steve