Once they have this then you can add the effects behind the dancers, such as coloured lights, flashing lights, smoke effects and so on. If the base is there the whole time your video will show everyone’s faces clearly.
Some venues don’t have their lights set up for an even wash, and you may need to ask to get this done before the show. If you are not sure, ask your video company to check the lighting before the show starts, and if possible, make adjustments
Sometimes people think you must have it all really bright. That’s not the case at all, it’s the even wash that is important. A good videographer can adjust their exposure according to the brightness of the wash. However, if the lighting is uneven, or only coloured lights then you will have problems with the video