The biggest challenge: which kind is going to be the best camera option?
Most mirrorless and DSLR options can shoot video and many of them may even be able to take UHD 4K or 4K DCI. Thus, if you are seeking a camera option that can take both still photos and videos, these would be what you should take a look at. DSLR cameras are made for optical viewing of the photo via the lens, and as a result, they are integrated with a mirror that can be locked up to shoot video. This demands on a live-view feature and an LCD screen to check what you are capturing. Mirrorless cameras are different as they have no mirror to lock up and use live view as a standard. The Sony A7S and A7R series as well as the Panasonic Lumix series are both mirrorless camera options that provide excellent performance.
In spite of the fact that there are some camcorders on the current market which are able to take stills, the stills tend to be restricted to only 2 megapixels or sometimes reach 10 megapixels so you will not receive the resolution of 24 megapixels that still cameras seem to be aimed at. You definitely can shoot video and pull frames in post. However, you should stick to your mind that video is, in general, shot utilizing a slow shutter speed and this will lead to motion blur to the photo, which is ideal for making motion look smoother but not ideal for sharp pictures.
Still cameras are often aimed at significant amounts of time. Thus, artifacts and defects in the picture can be noticed quickly but distracted. Thus, stills resolution is often high, with most current still cameras coming with sensors of 24 megapixels, which is better than even 4K UHD origination. A lot of still cameras nowadays provide the choice to shoot video either of HD or 4K quality. Thanks to large sensors and adjustable lenses, this is considered to be an attractive feature.