Whilst I agree that offfering a 15 minute video as an answer to a comment, with no timestamp/tldr for a quick answer is extremely inefficient, the video specifically states that you don't need to put on, as you say 'gazillion clothing' items, and the narrator in the video says that he only wears a jacket, gloves and a hat whilst cycling in the winter. The majority of the video is spent making the point that the barriers to winter cycling are not due to the cold, and more due to the infrastructure for winter cycling not existing in most places.