Hello can someone please give helpful hints or honest opinion to this trailer that I made?

Don’t make the tongue too short. And don’t forget to add safety chains!

It required a lot of work, but is without any meaning. Disjointed outtakes from recognizable films and commercials with no discernible plot or message. Why put so much effort into such a jumble?

Not bad at all. You need to adjust volume when you transition to frames with louder audio. The trailer appears to be a little disjointed because there are too many jumps, too many clips. That is all I can observe at the moment.

A typical good movie trailer for me is one that effectively teases an exciting plot. The visuals could be bewildering to the point of nausea ( just me ) but it should never be convoluted with having more than one train of thought going in different directions.