Choose Insert, then More Gadgets.
In the Google Sites Editor, open the Insert menu. You will be able to see a list of gadgets you can add to your site, like Links, Tables, and Images. Find the More Gadgets option, and click it. This allows you to install customizable tools such as the POWr Vine Feed to your site.
Paste in URL
You will see the Gadget manager. Click Add Gadget by URL. Then copy and paste this exact URL into the box. Choose Add to complete.
Change Height and Width
Now that you have embedded your new, fully customizable Vine Feed Widget onto your website, you'll probably want to change the shape and size of the Widget. Use the different options in the window to select the height and width of your plugin. You can also choose to add a border, scrollbar, or title around your Vine Feed Widget, but we don’t recommend it. You will have more editing options through the plugin.
Set up POWr Vine Feed
Go to your live Google Sites web page and select the settings gear in the upper right corner of the Vine Feed Widget.
In the POWr Editor, click Import Existing Vine Feed, find Vine Feed- and click Copy.