A:AnswerIf the Blu-ray player is not smart built in,with wifi, than it is analog. You will be better off purchasing a smart capable Blu-ray player if you need to have wireless capabilty, This product is mainly for usb interface wireless connectivity for Computers and such.
A:AnswerProbably not. Typically TV's need very specific WiFi adaptors made by the company that made the TV. An example would be WiFi on a Sony TV will require a Sony WiFi adaptor.
A:Answerrecommend changing the router location in the household, replacing the router or yes a range extender could work too. But moving the router to a proper location should fix the problem as long as its not a hardware issue with the router.