Task: In Microsoft PowePoint , Add the first video from the gallery to the slide 2 of the Opened presentation .
Steps:
Open the PowerPoint app
Click on the Slide 2 outside the image
Click on the v upward button at the bottom right corner
Click on the Home button
Go to Insert option
Choose the video insert option 
Click on the video option
Go to the photos section
Select the camera folder
Select the video
Select the video