A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
If your video was shot on an iPhone, it uses the H.265 codec by default. You can buy the H265 codec here: HEVC Video Extensions
You can set your iPhone to use the H.264 codec instead of the default. Then videos will automatically be compatible with PowerPoint. Choose Settings>Camera>Formats and choose Most Compatible.
For other codecs, you'll probably have an easier time if you use an online convertor like zamzar.com to convert to MP4 format with H.264 video codec and AAC audio codec.