This is simply not a great idea. Consider that "trailer" is just a fancy word for an advertisement, because that's exactly what it is. Would you really expect someone to sit through "at least" (your words) a 2 minute advertisement? Even 60 seconds is pushing it, to be honest. Maybe think of the new channel trailer being limited in time as an opportunity to grow as a content creator; it could be a great exercise in your ability to sell your content in a more concise and effective manner.
This is simply not a great idea. Consider that "trailer" is just a fancy word for an advertisement, because that's exactly what it is. Would you really expect someone to sit through "at least" (your words) a 2 minute advertisement? Even 60 seconds is pushing it, to be honest. Maybe think of the new channel trailer being limited in time as an opportunity to grow as a content creator; it could be a great exercise in your ability to sell your content in a more concise and effective manner.