Block non pre-rolled ad placeholders on videos

[MrFeelgoood]

Hello, I am a mac user and I love KA - BLOCK! I noticed that when I play videos especially youtube videos on mac os safari, KA-BLOCK does not effectively remove the rectangular banner that appears at the bottom of the video ( I don't mean pre rolled ads and sponsors because I know that they cannot be blocked by KA -BLOCK!). Sometimes the ad is blocked but a white shape is left instead of the actual ad, like an annoying placeholder. Can this be fixed with the next version of KA BLOCK? I would love it. Ty for your time.