The thing about Verbal is that it's not as clearly tied to concepts like quant is (though as I've emphasized before--even quant isn't *really* about 'concepts').
SC has some concepts, but more than that it's how you read, interpret, and think about sentences based on structure and meaning. Here are several videos that cover, I think, a huge amount of SC topics (I also very much recommend picking up an MPrep manual. I was recommending MPrep for SC long before I taught at MPrep).
Reading like a Robot for meaning and structure:
https://www.youtube.com/watch?v=6nYDowbo1mI&t=2382sThe Three Pieces of Sentence Structure:
https://www.youtube.com/watch?v=lIsU_JI7Z6wModifiers and Sentence Structure:
https://www.youtube.com/watch?v=R3A9YyFw-UQ&t=74sEverything you could know about Parallel Structure:
https://www.youtube.com/watch?v=GOGIxNizBWsSentence Correction Comparisons:
https://www.youtube.com/watch?v=Dx7VTLOKUr8(The one major topic we haven't made a prep hour for yet is 'Pronouns,' but that will be in our manual).
SC Mixed Review:
https://www.youtube.com/watch?v=vMx8RQXQGD8 For RC and CR...
These are trickier.
After all, there aren't any... *rules*. Or formulas to memorize... There's just the text in a passage/paragraph, what you read, and what you're thinking about it. When you miss these, you really, really have to dig to figure out why. These are the questions student *think* are 'more subjective' than others, but the truth is, they are as objective as any other problem on the test. However, there tends to only be *one line of reasoning* that makes the right answer right.
Here's a tactic that forces you to think deeply about why you might have missed or struggled on a question:
https://www.youtube.com/watch?v=Xem2vqSyenEThe thing about verbal, also, is that you might need to really shift your reading habits. Here are some videos on that:
How to read RC (part 1):
https://www.youtube.com/watch?v=3NnZEUK1rCE&t=1642sHow to read RC (part 2):
https://www.youtube.com/watch?v=TmSc_-LV7S8 How to passage map for RC:
https://www.youtube.com/watch?v=wtfpT9DJbCMRC Question strategies:
https://www.youtube.com/watch?v=VToJy-oQMeA&t=1782sSome drills to get you thinking deeply about RC:
https://www.youtube.com/watch?v=dJfvkth69UsWhen it comes to Critical Reasoning, a deep understanding of how arguments work and what 'assumptions' are is hugely important.
CR FAQS:
https://www.youtube.com/watch?v=Hc4Cb_HM3c8CR overview:
https://www.youtube.com/watch?v=hC5i78ZOs_cArgument Deconstruction:
https://www.youtube.com/watch?v=OSL3mKNVG3M&t=3095sThree Key Questions for Critical Reasoning:
https://www.youtube.com/watch?v=PfTcOr6zJjsValue of Pre-Thinking (Mostly DS, but the last question is CR):
https://www.youtube.com/watch?v=3NEqP1On-3kCritical Reasoning Games:
https://www.youtube.com/watch?v=Xmz46ADcFdw&t=2152s(Note: I made that a few years ago. There are some things I've changed about how I teach this stuff, but the general message, I stand by).
This video was made for our Free GRE Prep channel, but I think it's lessons are broadly applicable to verbal on both tests:
https://www.youtube.com/watch?v=cKg08_0H_oYSo. There's several hours of viewing for you to get you started! My biggest advice as you start digging into verbal: do not expect to learn a few rules and see a score increase. Reflect deeply about how you read, interpret, and think about the ideas imbedded in written language. It's called Verbal 'reasoning' for a reason.