Is Netflix pulling a lot of data?

Thanks to the last question, I chose Netflix now.

In my room (a kind of dorm), I'll need my laptop. Unfortunately, 20 GB cost a whopping 20 euro. Therefore, streaming movies really does take off. How does Netflix work? Of course I need internet to log in at all. But as soon as the movie is running, does he also subtract something? I was told no.

Please explain for dummies if possible:-)

The movie is downloaded from the internet. It's faster than you need to look at it, but it does not help you.

One hour Netflix consumes 310 MB at low video resolution, 720 MB at standard resolution, and 3 GB in HD, and those who stream in Ultra HD resolution consume around 7 GB per hour.

Of course, every minute of film you have to watch has to be downloaded from the internet. (They do not suddenly emerge from nothing on your hard drive) Netflix is still relatively human. Thanks to good compression, it draws significantly less data volume (about 700Mb / h) than for example Amazon Prime (about 6Gb / h on high or 2Gb / h on medium quality) or YouTube (1.2Gb / h in 720p30)

Therefore, Netflix is still the most sensible alternative with limited volume. Maybe a LTE router would be something for you. Fares with 50Gb do not cost much more than your dorm Wi-Fi

For stupid? OK

A film consists of many many photos that are displayed very quickly in succession and sound, which was stored in a complex process, with many many samples per second as a data stream and synchronized with the photos.

Because that's a lot of information, you use compression techniques to reduce the amount of information. In the case of sound, e.g. Removed frequencies that we do not hear anyway. In the photos you compare, for example The last with the next picture and cuts away everything that looks the same anyway.

At some point, the boss of Netflix then gets a USB stick with the finished movie on it and loads it onto his server. Once in super good quality, once in good quality and once in less good quality.

Now that you have logged in, picked a movie you want to watch, and then start playing, the Netflix server will ask your Internet service provider how fast your line is and, accordingly, select the movie in a quality you can watch without the film in between stops again and again.

The server now sends all the information to your home using your internet access. All the pictures and also the sound are transported via your Internet line to your TV / computer. So there's a stream of data flowing from the Netflix server to your home.

Well, I can't get the curve. Of course he pulls off something!