Most conservation labs are equipped with high quality DSLR (Digital Single Lens Reflex) Camera for still documentation. Many of these cameras can record high quality video as well.
This can be the most challenging method of capturing vide so we recommend practicing and testing to get used to the camera.
Like the iPhone you will need to double check your footage as most of these cameras do not have a headphone output. So you might want to do a test and download onto your computer and have a listen.