A phrase that would sit in a title in your lane, and a floor: views, a multiple of the channel's own normal, or both. Once a day the rules run over every video the Intelligence Database measured; each video is reported once, one email a day at most.
Type the phrase, set views at least and times its own normal, tick Shorts if you want them. Preview shows what the rule would have caught in the last fortnight, each with its multiple, so you judge the floor before saving. Save alert, and the first run is tonight.

Knowing your subject is your job; knowing the day the world is looking at it is ours. A view count alone says nothing; the multiple says whether the video beat its own channel, which is what makes it worth studying.