From 5 reps to 20+

I am doing deadlift today, yesterday night i saw a video where guy said we should try 20reps set too by dropping our 1rm to like 60%

So from usual reps of 5 per set , today i did 20 in squat . It is feeling pretty burned out and i feel like i am doing cardio.

So yeah it works . Just a thought , mixing up reps and sets is good.