Videos are a popular way of giving people information. You may want to use a YouTube video or, if the video is of interest in China, you may want to add the video to the Media Library and use it from there.
YouTube Videos
Insert a Rich Text widget onto a page
Click on Insert Video in the pop-up menu
Paste the YouTube link into the pop-up
Optionally click Autoplay
Click Insert
Click on the video to see the Video tools pop up
Video from the Media Library (or YouTube)
Add a Video widget to the page
Click on the Video widget settings cog
Click Select to select the video from the Media Library or enter the Video URL for a YouTube video