taco rc nd filters

I got Taco rc filters that came with ND 4, 8, 16, 32 and a UV filter. I've used the a couple of the ND filters and they are great, but what does the UV filter do?

Tests done on the afternoon of Feb 20th. Weather was cloudy and gloomy, threatening rain and was windy. Mavic is stationary using my Galaxy Tab S2 to capture screen/prints. My goal was to try each filter from the UV to ND32 within the same time period to see which filters would come closest to...

TLDR (Video): https://photos.google.com/share/AF1QipMib0AatS7pjHh-MrvW1FZd1C1r1pOoNMg0Gt9eHOTc3D_-T3uPRrtOu9zN7RGpCQ?key=SVkyTm9xZE1nSHA1cHk2SFNteTR1cUZubjJZaU53 ND16 Taco filter let me step down to 50 FPS, 100 ISO POI rotation at about 25 feet radius and 15 feet up. Video footage was very...

This is somewhat of a comparison of not using a filter and using a Taco-RC ND 32 filter on the Mavic Pro 4K camera. I say somewhat because the recordings are a few days apart but the weather had not changed that much. I used LUT tables in Filmora (Star Wars) to get the best visual on the lower...