It's something you could do during your Netflix free trial, without having to pay a single penny. However, there are many programs for Windows such as FlixGrab, Kigo Netflix Downloader or Flixicam, which allow you to download Netflix movies in the form of friendlier files, such as mp4 or mkv, so that you can have those movies forever and watch them in any program and device whenever you want.
Of course, this is far from what it means to be able to "download free from Netflix", since you need a valid account first. The policies will surely be similar in all streaming services such as HBO Max or Go, Amazon Prime Video, Disney Plus and even related to music such as Spotify.
nfv file of the movies, you can only see the downloads in the Netflix app, on the device you downloaded, you can download up to 100 titles (some titles only certain times a year), the downloads "expire" every so often ( 2 to 7 days) and you can only download on the maximum number of devices supported by your plan.
HOW LONG DOES A NETFLIX DOWNLOAD LAST WATCH ONLINE
Netflix, the service that offers a catalog of movies and series to watch online in exchange for a monthly payment, implemented several years ago the option to download a large part of its movies and series to the cell phone, tablet or PC, for free, but as long as you have an active account (the downloads can no longer be seen if your subscription has expired or you close the account).