There are 2 things to think about when it comes to 2D or 3D videos. Budget and what you are showing. 3D will cost more. There is a lot more technical skill involved in 3D animation. But, you may have intricate pieces of equipment that you wish to showcase. You may want to show a valve system and then fly down the pipe to follow the travel of liquid. For some that may be overkill. Sometimes a 2D explainer is all you need to get your information across.