Any YouTube courses you can recommend?
Never trust content that isn't live, because then you're only seeing what they want you to see.
If you want any chance that the person you're watching is legit, it has to be live. Find the people who live stream out of boredom; Stock Jock, The Stock Guy, Ross Cameron (he's only live if you pay him, if not it's a delayed recording). They're all stock traders rather than FX but a trade is a trade.
The only FX "documentary" I'd recommend that's pre-recorded would be from