i believe you should be looking for a HDMI cable. This extra long cord can be used with a USB port such as a printer or computer, camera, etc. That is my understanding. I'll be checking back to see what others say.
Buy yourself the Samsung $40. HDMI adapter. Then get a HDMI Cable. I BOUGHT A 10' ONE at Harbor Freight for under $15. Then plug into a hdmi port on your tv. Adjust your tv to that port. Hope this helps. Mine works great.
The tv has to be a wifi tv and your phone and tv must be on home network. If that is all ok, if, for example you are watching You tube...there is an icon in upper right corner...click that and video goes to tv