Imagine you have a video that you want to place at some corner of the slide of your PowerPoint presentation and you want the slides to advanced on click or at the set time, along with video without altering it in any manner. So how do we do that. Well! this is a very easy hack/tweak that anyone can do, here’s how:
Open your presentation and navigate to the the first slide or to the slide you want the video appear and play across slides.
Go to Insert > Video > Video on my PC
This will open up a pop up window, navigate to your video location, select the Video and click Insert
The chosen video will be added within your slide, now resize the video and place it at a corner of your slide.
Set the Playback of the video to Start Automatically
Go to Animations and set the animation to Start With Previous, then click on Animation Pane.
From the Animation Pane double click the video animation(not the trigger).
This will open Play Video options window, set the Stop playing to After and enter 999 in the slides section and click OK.
Now play your slideshow and advance your slides — you will find your video playing across slides.
Here is the video tutorial: