If you recorded your presentation you made, which is always a good idea, you can learn a lot by critiquing your presentation. If no one recorded it, ask your audience or team for feedback.
It is totally normal to cringe when watching and hearing yourself, but you can learn so much and correct things for the next time. Just suffer through it – just pick the points you feel need correcting. Take notes of things you can improve on, as well as what you think you did well.
Did you talk too much? Did you stick to the point or ramble on? Did you smile as needed, or look angry? Did you crack a joke if appropriate? Did you look at the camera or away from it? Did you get all the information out that you wanted to? Did you have a way to look at notes to remind you of the points to make? Did you sit or stand straight, or were you slumped? Did you come off as boring or as interesting? All these and more should help you correct and make the next presentation better.
I had to take a public speaking class and our speeches were recorded and the class critiqued each one – a lot was learned to help the next speech with the feedback points. The more you practice, the better you get.
Take notes as you watch it play back. Critiquing your presentation is a great tool and a way to make it better for the next time.