Exactly, also you have no control over that hotspot, the company uses your payed line to make more money, as they sell this to others as a service and on top of everything, you have no control to your router whatsoever, you have to login to the company's website and see what limited options they provide you.
Also, in France I had terrible problems with latencies and ofc with Youtube
I think you are talking about Free.
The router is indeed completely controlled by the ISP and you use the company's website for settings. However, it not as bad as it may seem because :
- The public hotspot is independent from your home connection. The IP is different and you are not liable if something bad is done with it.
- You can disable the hotspot feature (but you lose access to others hotspots), you can also turn off WiFi completely.
- QoS is used to prioritize connections. The order is : VoIP, TV, Home internet, Public hotspot. As you see the public hotspot has the lowest priority so it is unlikely to impact you.
- If you want control over your internet connection you have "bridge mode", which I think is the best compromise between features and control. In this mode, you get a public, internet-facing IP so that you can connect your own router behind it and manage things like DHCP, DNS, NAT, port forwarding, etc... yourself and you still get to keep VoIP, TV and hotspot. You can't control QoS effectively though.
- It is possible to take full control of your line by replacing the ISP's router with your own modem. A bit tricky though, and frankly, not worth it for the vast majority of people.
You are right about Youtube and the global quality of their backbone though. It has improved a bit but Free still has one of the worst connectivity. If it is a problem to you, I recommend OVH (if it is available). As an ISP, it is geared mostly towards small businesses and has a very good peering.