@Shay65 a booster might work but ideally you may want to consider buying a whole home wifi mesh system. Basic boosters need to be installed in an area with a strong signal so no more than half way between where the hub is located and the room requiring the boost. To stream video you need both reasonable speed say up to 35Mb/s for UHD but also a signal free from interference.
Sky only supply boosters to customers who buy their Broadband Boost bundle who ask for one but they have a new improved system called Wifi Max which currently codts £7.50 a month which can have up to 3 exrenders at no extra cost if an engineer decides you need them after a visit. A basic home wife system costs roughly £100 for 3 extenders which in my home gives very good coverage for my 3 pucks and Glass TV but YMMV.
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65inch Sky Glass, 3 Sky Streaming Pucks, Sky Ultrafast + and Sky SR213(white Wifi Max hub) main Wifi from 3 TP-Link Deco M4 units in access point mode
