Yes, but premium revenue is decided by watch time, long videos get more revenue usually, with videos at around 90min length being 50/50 payout from ads and watch time. Assuming ads only at the beginning and end of videos and the video target the "average" audience, and average view duration of 30mins.

So you're looking at a 50% reduction in income minimum, much more if you make short videos that target audiences with higher $/cpm like finance or health, in those youtube premium is probably only around 5-10% of revenue.