Hi there, I'm Matt Sergei (do call me Matt) and while I'm technically versed to create your desired PowerPoint templates I have a different proposal.
Because of many such packaged templates available that cost from 29 USD (at start of promotion) to 99 USD (that's a high end) - talking about Internet "underground" e.g. smaller companies or individuals, not like Adobe etc - it's simply not meaningful to have these templates done by ordering them. Unless you want only standard template for your company etc.
So my bid is to:
1. Find, describe and list (with URLs) all the best video presentation template packages available as mentioned. They are always done for PowerPoint, sometimes also for Keynote and OpenOffice/Google Slides. Note that at least version 2013 or 2016 is required to use them without issues.
2. I'll also write my notes about them (I know and follow many of them for years now, sometimes buying them) since there is limited number of vendors offering quality video templates. For example, if you don't have named placeholders (image, text, shape) for template's slides, it might be hard to use them effectively etc.
3. I'll help you with some consulting what works best (exporting to MP4 for example does not give best quality result on Windows).
Looking forward to your reply,
Matt