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No time to watch videos? You know, it's old school, but reading the manual never hurt. There's even a few tutorials in there.
Sometimes I prefer a book to a video, because I can turn pages fast to get what I want to know. Compared to a video that is committed to a block of time determined by a producer, reading is sometimes a more efficient way to learn.
I think the true value of videos is to demonstrate an unfamiliar technique with a step by step visual guide.
But for just learning the terminology and how something works, I'd rather read about it. And play around with it.
Just my two cents! 
You've been a great help to me, so your two cents is worth far more to me!
I've just really been "sidetracked." I'm a synth nut, and I have acquired Moog and Nord rack units in the past few months, which led to a new audio interface and a midi interface. I'm in the process of learning those, and reading a book about subtractive synthesis. One of these days, I'll actually get around to Sonar!