Convert mp4 Files from GoPro Camera to a format Adobe Express can use using Adobe Media Encoder

I have files on my PC I have downloaded from my GoPro camera.  These are downloaded as .mp4 files and are unusable by Adobe Express in my video project.  I then downloaded Adobe Media Encoder to be able to convert the files to a format that Adobe Express can use.  I don't see .mov as an option (this is the file type from my iPhone that Express has no problem using).  I have tried to convert to a lot of different formats and still nothing seems to work with Adobe Express.  Is there a file type I can convert these to in Media Encoder so that Adobe Express can use them?