People who want to see the logos without scrolling for hours. It may help them to find the logos they like. You can find your logo at 5:00. The order is more or less random. Why do you want your logo at the end? The video is 1920x1080 px. 25x25 px would be to small. Also: Why should it be black and white? I' dont understand why you flagged the video. Was it because of one of these:
Disagreement on rewards
Fraud or Plagiarism
Hate Speech or Internet Trolling
Intentional miss-categorized content or Spam
?