A:AnswerYes. Whatever you have saved on your YouTube account will be in your YouTube account no matter what device you're on. So if you watched a video on your iPhone from YouTube and then when you log into your account on the YouTube app on the tv then it will be in your recent history or saved videos if you saved the video.
A:AnswerYes. Look in your Smart Hub and open you e Manuel. Scroll down to the Appendix and find "Read Before Playing Photo, Video, or Music Files" for the lists of supported file types.
A:AnswerIt has a hmdi port. I picked up a conversation cable from Amazon and connect my laptop to it and it worked after changing settings on my laptop
A:AnswerThis model is the 2015 one. But I would not let that prevent you from buying it. I love the TV and since it is last years model it is cheaper and I feel a good value.