Can I mirror my iPhone screen to my mac?

No, not what you are probably thinking, but there are 3rd party apps for your Mac that will allow you to mirror your phone to your Mac. There are for demoing use of the phone to an audience, however, and are actual phone size on the Mac; not for watching videos. Reflector from Airsquirrels.com is one, and some video apps will work also, like Elmedia video player. These products are just examples, and do not imply a recommendation for or against.

No.

Screen Mirroring (as outlined in the video) is the feature I recommend. 