correct me if im wrong, the 10mpbs thing is not referring for providing u a 10mpbs on viewing a youtube file. Is more like u having 3 pc sharing the same connection, those 3 pcs can view the youtube simultaneously at the server D/L speed. Even doing some torrenting behind also will not affected much.

My opinion is, 10mpbs connection can support many pc at once for great browsing experience. i believe malaysia undersea cable latency still capped at 1.2mb/s 

Im torrenting with 2 pcs at once which still able reached 1.0mbs each for healthy seeds

just my 2 cents.