It probably depends on your IP address, country and maybe something else. Some time ago I was unable to register on youtube without providing a phone number, an

It probably depends on your IP address, country and maybe something else. Some time ago I was unable to register on youtube without providing a phone number, and earlier I have registered a Google Account from Android emulator that was instantly blocked. Maybe it is because of spam, or maybe because lot of people are using the same IP address.