Hi

I need to have my powerpoint slides in full screen and at the same time I need to speak over the slides and then record it as a video. Any ideas? So basically I need to have my own video while I speak in the corner and presentation slides

It isn't hard to convert a PowerPoint to a video file. What you will need to do is make a video of your narration then use video editing software to the 'picture-in-picture' effect to get the desired result.