Animated mock-up explainer PowerPoint video editing

We have a 5-minute animated mock-up explainer video made in PowerPoint that needs editing. We already have it made, but it needs to be edited to look more professional and appealing. We would prefer everything to be completed in PowerPoint, but we are open for suggestions . If you have relevant experience you are welcome to apply, but you will have to sign the NDA since the matter is confidential. Please attach links to your previous similar work when applying. *NDA concerns only sharing confidential information and does not assume any form of co-operation, as specified in the document itself.