I have three years of experience as an information security analyst and I have registered to take CISSP exam on 14th April 2020. My plan is to go through cybrary videos once, then move on to official CISSP sybex book and practice questions. Will that be enough. Please provide your inputs.
To be honest, don't know.
My experience is that everyone learned differently.
You mentioned you have 3 years experience, but in what exactly? Did you have any previous formal training or education in IT, computer science or the like?
At first glance, this seems enough. The videos should be good, and reading the books and doing the practice exams should help you in filling any gaps.
Hopefully this will work for you.
This is a hard question to answer and very much depends on your memory and learning style.
I found that just the book and the practice questions were sufficient for me, but I've been in the industry a long time and have worked in almost every area of security so there was very little in the book that was new. With 3 years experience I'd expect that you're going to find new things that you need to learn.
Good luck with getting your CISSP!
I'd echo Steve_D's comments, it depends on you learning style to some extent. Personally I find video's don't really work for me, but they may for you. I'd suggest you consider using more than one text. The CISSP all in one used to be a good resource and you can't really go wrong with the official ISC2 textbook.
It's really more a question of how you process the volume of information in the CISSP so you can gain and retain your understanding in a way you can use for the exam. I went through 3 different text books, did the self tests and summarised each CBK into hand written notes, learnt the note and repeated the self tests. If there was a CBK on which I didn't get over the pass mark I'd go through all the material in that area again. I'd been using that way of studying for about 20 years by the time I took the CISSP, so knew what worked for me. I suppose you'll have to find out what works for you. Good luck with the exam!
Given the open-ended nature of the question, I'll just stick with read "Security Engineering" by Ross Anderson, and, for specific sections, check out