To add a video from Youtube, you copy the video’s link and paste it on the right side of your screen where it says “embed from Youtube.” You can also use Youtube’s embed option, where they give you a special link to paste it in the same place on your Prezi. Then, click on insert.
There are some disadvantages if you work with videos from Youtube. First, you will have Youtube’s frames with the subscribe option, titles, and buttons. This can sometimes be distracting. Secondly, it may also happen that when you try to play the video, you get an ad. Thirdly, the Youtube video will play only when you are online.
But the good thing is that your presentation’s file will be lighter, which is advantageous if you want your presentation to load faster.