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I definitely would not advise directly replacing study notes with video lectures.
I tried something similar for my Level II – I started with video lectures with the aim of completing my first round on the syllabus real quick. I ended up getting a fairly patchy first run on the syllabus, and ended up doubling back and restarting using study notes.
Use video lectures as a reinforcing material, but I’d advise against using it as your primary source.