Just a guess, but from the preview image the site shows, youtube w/o ublock loads 2 large banners, and one row of videos, vs 3 rows of videos w/ ublock. The lar

Just a guess, but from the preview image the site shows, youtube w/o ublock loads 2 large banners, and one row of videos, vs 3 rows of videos w/ ublock. The larger number of video thumbnails shown may explain the larger size