With YouTube Mastheads you can get 100% share of voice, not just on the desktop YouTube site, but also across screens with:

Allow you to only pay for those ads that are actually viewed Allow you to pay for ads when they[...]

Masthead video campaigns mobile app engagement campaigns video campaigns mobile app installs campaigns[...]

Ads above the results get more prominent notice with desktop screens. There are also no ads on the right-hand side[...]