Does a screen recorder helps in giving code review feedback?

What do you want to record as feedback? I can see it helping to show how a UI component behaves or even how to use an IDE's features to fix a class of problems you identified. It might help showing the code being written?

However, for any process you might want to record, remember people are used to inferring the process from end results, so it's probable diffs and before/after screenshots are easier for people to digest compared to screen recordings.