Hi Diane -- Winter damage typically occurs in boxwoods when the ground is frozen and cold and dry winds blow across exposed leaf surfaces. There are several things you can do to prevent damage and protect your plant for winter. Moisture is extremely important. Dry conditions going into the winter can make boxwood tissues more susceptible to cold damage. So, in addition to watering your boxwood throughout the growing season continue to water it into the fall until the ground freezes. Also mulching the soil will help keep it moist and protect shallow roots from freeze injury. Cover the roots with 3 to 4 inches of shredded woodchips. Mulch should be applied in a "donut" shape. Pull the mulch away from the trunk about 6 inches. Anti-desiccant and anti-transpirant sprays have been found to be not effective for protecting boxwood’s evergreen foliage. Bright winter sun and wind can also cause leaves to turn bronze. You could construct a barrier of burlap on the south, southwest, and windward sides of your boxwood. If a plant has exhibited injury on all sides, surround it with a barrier, but leave the top open to allow for some air and light penetration. These sites have information on winter injury: https://extension.umn.edu/planting-and-growing-guides/protecting-trees-and-shrubs-winter

https://www.extension.iastate.edu/news/2009/may/060801.html

Lastly, I could not find any videos from educational sources although I did locate a YouTube video (cannot attach link, but you can find by opening the app and entering “Using burlap to protect trees and shrubs in winter” in “Search”) on wrapping. That said, University of Minnesota Extension does not recommend or endorse the products or services of those who created this video but you may find the information relevant to your question. Good luck!