Yes, Hulu Basic with Ad plan is enough for downloading 1080p and 4K videos.
Wilson
Wilson.Wang
If it helps, I looked at the Stremfab Updates page, version 6193 worked correctly with the Hulu/Disney+ duo plan. 6194 broke it, your team recognized and fixed it for some people in 6196, but the rest of us remain broken even with 6202. 6194 said "Some improvements for the display of the analysis process" and this is where it broke things.
Getting a second Hulu account to get around this would not be the first choice. So getting the devs to look at what changed with 6194 might help fix this issue.