Youtube

You have to wait for the video download> 360p for a few seconds, the cliffs in the middle of the viewing has become an everyday affair, and this is with a fairly wide channel.



The reason is that providers lower their speed to caching video servers; all they need to do is block access to them.
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In order for the request to go past the YouTube cdn servers, it is necessary to block the range of ip addresses (in the router or on the computer).

173.194.55.0/24 and 206.111.0.0/16

Under Windows (except xp) with the firewall turned on, it is enough to open cmd with administrator rights.

netsh advfirewall firewall add rule name="youtube" dir=in action=block remoteip=173.194.55.0/24,206.111.0.0/16 enable=yes

sudo ipfw add reject src-ip 173.194.55.0/24 in
sudo ipfw add reject src-ip 206.111.0.0/16 in

linux
iptables -I INPUT -s 206.111.0.0/16 -j DROP 
iptables -I INPUT -s 173.194.55.0/24 -j DROP