Its illegal as the stream is from a subscribed channel in the uk (sky sport 1) and the digital rights are owned by Sky.
Digital streaming rights are the same as TV. if you dont own them for the country youre watching from you are breaking the law.
doubt if all 3 streams will be from sky sports... also its totally legal to watch foreign channels in your own home.. in fact a lot of pubs have ditched sky for foreign satellite for the football because its cheaper. Sky threatens with court action but always drops the case.
Infact, Ive never seen one of these net stream stream sky sports. They usually stream ART Sport.