Today, I tried to download a video on Youtube that was free, as in royalty free, Creative Commons-licensed, stock footage provided by a film-maker with written consent for use in my commercial projects. Despite Youtube supporting marking videos as Creative Commons-licensed and providing this metadata on the webpage, it won't actually let me download the videos for free.
Youtube displays a "download" button on some videos, but clicking on this button opens a dialog window telling you to sign up for Youtube Premium in order to download the video. While there is a free trial, the popup will tell you that it will start charging you money after a month—a monthly subscription of R$24,90 per month in my case—and you must provide information for tax purposes such as a taxpayer identifier and your birth date in order to even sign up for this free trial before downloading the video.
To make matters worse, I'm fairly sure even if I did pay for Youtube Premium, I wouldn't be able to use the Creative Commons-licensed footage because the "download" wouldn't be a file in a standard video format like MP4 that I could just import into DaVinci Resolve to edit, for example, but some proprietary format with DRM that only works in Youtube's own video player. At least that's how it seems to work with normal videos.