I knew that there would be posts on both sides of the coin, hence my "popcorn" comment.
Is it possible to make a good knife from a file? You betcha, as long as its made from good steel and you don't get it too hot when grinding it. Bob Loveless made his first knives from files tempered in a galley stove on a ship and we all know how that turned out. I'm afraid that you got the one in the video too hot so I suggest you keep them cool from now on.
Chuck & Shaw made you a really good offer. I suggest that you use one of those files to turn that piece of steel into a blade and send it to Shaw for H/T. I was going to offer to H/T it for you but Shaw beat me to it. If you need a pair of Micarta or G-10 scales let me know the approximate size you need and I'll be glad to cut you a pair and send them to you.
One thing you need to realize about the knives on this site. No matter what the price, materials, or degree of finish, they are ALL first and foremost high quality cutting tools. I don't know of maker that puts fit and finish above performance. I've seen some very expensive knives on the belts of hunters and they weren't wearing them for show. They use them for anything and everything they would use a $20 knife for. There are knives on here that sell for $30 and up and each one has its place but an overheated file is just, well, an overheated file.
I look forward to seeing what you make from the steel Chuck sends you and if I can help you anywhere along the way don't hesitate to contact me.