Add and format in powerpoint for the web
Tap inside the text placeholder, and start typing.
For text bullets, place your cursor in the line of text, and on the Home tab, select a bullet style in the Paragraph group.
Select where you want to insert the picture on the slide.
Select Insert > Pictures and where to find the image: This device, OneDrive, or Bing pictures.
In the dialog box that opens, browse to the picture that you want to insert, tap that picture, and then Insert.
Insert Shapes, Icons, and SmartArt
The Insert tab allows you to add visual appeal to your slides.
Select Insert > Shapes and in the drop-down select the shape.
Select Insert > Icons and in the drop-down select the icon.
Select Insert > SmartArt and in the gallery tap the layout for the SmartArt graphic you want.
In your web browser, locate the video you want.
For an online video, copy the URL of the web page from the Address bar of your browser.
Switch back to PowerPoint and select the slide where you want to place the video.
On the Insert tab of the ribbon, select Online Video.
In the Online Video dialog box, paste the URL you copied in step 2.