You can embed a video in presono in several ways: either directly in presono or as an iFrame.
If you use an iFrame, you can embed a longer YouTube video, for example. With iFrames, however, it is important to note that you must be online while presenting. Therefore, you cannot play the video in the offline app in offline mode.
Therefore there is the possibility to use a video directly from presono. To do this, you need to upload the video to presono, then you can simply embed it in your slide, just like with images.
The advantage is that the video is also available offline. In addition, you can make various settings, such as that the video can be played automatically or in continuous loop. Read more here: Various contents in slides