It's interesting data, but the obvious response from YouTube would be "we run sophisticated click fraud detection algorithms and periodically remove interaction

It's interesting data, but the obvious response from YouTube would be "we run sophisticated click fraud detection algorithms and periodically remove interactions determined to be from fraudulent accounts; given the current political climate White House videos attract more of these types of fraud than other videos on our platform and thus the effect is more pronounced on their videos". The numbers in question are small enough (~1k missing interactions) that it doesn't seem totally unreasonable.