This is an incompetent help video. What worked for me was simply joining the correct homegroup. This video must be a stupid joke where the thinking is: Who cares if I get a ton of thumbs down. I am getting VIEWS! What an idiotic concept.
This short video utterly amazed me by showing the trick to get our 2 computers on our house peer network back in contact with each other and with our printer that is connected wirelessly to our router. Thank you so very much. I wasted 3 hours today trying to figure this out before I found your link by Googling "what are network credentials". I swear, sometimes these things drive me to distraction and it's no surprise that some people just give up and buy new gear. Now if I could just figure out what bug is causing my computer to freeze 2 or 3 times a day. Got a vid for that, LOL??