It was not very bright out, but I used a polar pro nd4/pl to allow me to lower the shutter speed without the white snow being too dominate.
To answer your question Gerry. Yes. You can always lower your shutter speed manually, but the ND filters allow you to do so with an acceptable exposure that doesn’t blow out your image. I probably could have done without the filter but it helped control the consistency of the exposure . I am pretty new myself as far as being concerned about cinematic quality and motion blur. I have found that a lot of people talk about it, but a good number of their videos don’t really have what I consider to be motion blur . It’s harder than I thought it would be to use blur and achieve a desirable effect. From my limited experience it also has a lot to do with your proximity to the subject . If you are 200+ feet up it can be a mess in my opinion.