One of my favorite machine knitters (Nyann Goro in Japan) who knits beautiful items also does YouTube videos. There is no narrative on her HD videos, the way she films them you don't need narration.
Below is one of her recent video's on how she replaces a tired and worn out sponge bar. Not sure I would leave the original nylon ribbon in but it seems to work for her.
And another of her great videos, this one on installing and using the Brother KRC1000. I could not embed the video, just click on this link: