Woodworking videos
I've had a cold for a couple of days and haven't felt like doing much, so I've been Surfing on YouTube.
I came across some woodworking videos by Paul Sellers. I don't do woodworking, but I found these relaxing, and it's simply a joy to watch an expert craftsman at work.
He also does maintaining some tools, including sharpening scissors, and chisels; the techniques could easily be used for knives.
Search YouTube for 'paul sellers woodworking'