YouTube search engine box got somehow smaller

The closest thing I can think of is a greasemonkey script to hide the video when username is equal to whatever expression you want, however the page would have been loaded so technically the uploader would stick get a click through link.

From what I've learnt finally, there's no way to do it. But that's really unfortunate.

EDIT: Although not what I really hoped for, VLC media player actually allows you to view YouTube videos in their original resolution.

1. Open VLC

2. Go to Media (menu) → Open Network Stream... → paste the YouTube video URL in field under the label Please enter a network URL: and hit Play.

3. When the video has loaded, play the video, right-click on the video, under Video (menu item) → select Fullscreen option; then right-click again, and under the same menu item (i.e. Video) deselect Always Fit Window option.

4. The video should now be playing in its original resolution.