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.
No question about it—youtube linked videos will NOW play with ads, particularly if you’re linking to a popular site. And as you note, the ONLY way to prevent this is to download the youtube videos to your computer, then insert them directly into your powerpoint (which permits you to edit the beginning and end points). To download, you’ll need to download an app for this purpose—just google “youtube to mp4 free converter” and you’ll be given several options. BUT, this is a very tedious process, and if you’ve got dozens of youtube videos, it’s going to take some time. However, it’s the only way I’ve found to bypass ads—forever.