Insert a picture
Tap or click where you want to add a picture on the page.
Select Insert > Pictures and select From File.
Find the picture you want and select Open.
Insert a copy of a file
Select Insert > File.
Select Insert as Attachment.
Select the file and select Open.
Insert a PDF Printout
Select Insert > File.
Select Insert PDF Printout.
Select the file and select Open.
Insert a video
Find the video you want online.
Copy the video URL from the address bar.
Select where you want it on the page, and paste it.
You can select the link to play the video back at its source or select the Play button on the embedded video and watch it right in your notes.
Source: Microsoft