But it's called devaluation. As long as you use the camera, there must be depreciation. But taking pictures belongs to the normal wear and tear of cameras, and taking videos for a long time belongs to accelerated depreciation.
When shooting video, the reflector is lifted and cmos is exposed. Generally, the cmos size of SLR is relatively large, and it is easy to overheat in a few minutes, because compared with digital cameras with the same sensor size (the latter is generally used to shoot micro-movies, documentaries, movies and the like), the difference is definitely great, mainly in the heat dissipation structure.
Single lens reflex shooting video, cmos heat accumulation quickly, there is no special cooling system, before long, the picture will be unstable, color temperature changes and so on.
The conclusion is, can you shoot videos and work with a SLR? The answer is yes, but it will speed up the life of the camera. Machines that could have been used for five years died in three years, such as SLR cameras used by some wedding companies. But the cost and lens of SLR are much cheaper than high-quality cameras, so it will be used.