I watch Lindy and Matt pretty regularly, occasionally I drop into Skalla's channel to see what he's done, but he does way too many cutting videos which I don't have much interest in for me to sub.
Matt Easton's great though, especially as I'm trying to self-learn some Fiore dei Liberi in addition to the showfighting style I use for re-enactment.
Edit: I'll add that Skallagrim's cutting videos are probably some of the best on youtube, as opposed to the amazing swordsmen who murder armies of watermelons and glass bottles with their mythical blades. But cutting tests and knives still aren't my thing.