We are planning on buying a new tv, however we don't know whether we need to buy a smart tv or not. The main things we want to be able to do, are watch videos that may either be already downloaded onto our laptop, or video's on youtube on our tv, and possibly bbc iplayer/ itv player etc. Can we do this without buying a smart tv? Would we need apple tv to do this? Would apple tv enable us to essentially mirror what I do on my computer on the tv screen?