I won’t suggest depending on them except for revision as the name implies
I have watched psychiatry series during the last few months. It is good in a way for revision. But if I had watched only the revision series without learning the main module, I can say that it wouldn’t help me undoubtedly.
You can consider rapid revision for preparation only when you have very little time left (1–2months). Then It could give you a little edge over those who didn’t start their preparation.
But if you want to get a good score for the descent rank, then learning the basics is a must, and you have to watch main videos to build and remember concepts well.
Only then you would be benefited from rapid revision during the last phase of prep.