Adding Media to a Page or Post
Within a page or post, you can add different forms of media, such as video, audio and image galleries. To add a video or audio, click on the Add Media button in the post / page editor, click on Insert from URL and then enter in the full URL of where the video / audio is from, for example Youtube, Vimeo or Soundcloud.
Please note - it is not recommend to upload a video straight to your WordPress site as videos take up a lot of server resource and most small blogs run on shared hosting. It is best to upload your videos on sites such as Youtube and Vimeo and provide the link to your video that way.
To add an image gallery within your post or page content, click the Add Media button and then Create Gallery. Select all of the images that you want to appear in your gallery and then click Create New Gallery.
Now you can configure the settings of your gallery such as number of columns, where you want the images to link to, size of the images and add captions.
When you’re done setting up the gallery click Insert Gallery. Please note: the gallery is a grid based gallery so for optimum results it is best to give your images the same height so that they all sit in line neatly.
If your theme is JetPack ready (Carbis or Gwinear) and you have the Jetpack gallery module activated, you will have additional gallery styles to choose from.