Go to your Account Settings and click Edit Appearance. Then select Edit Theme.
Underneath Custom Theme, click Edit HTML.
Copy and Paste Script
Paste the POWr script into the HTML file between the Head tags. Update, then save.
New Text Post
Back inside the Tumblr editor, insert a new Text Element.
Copy and Paste Shortcode
Paste the POWr shortcode into the text post, then save Expand the post to see your new Vine Feed plugin. You can edit POWr Vine Feed by clicking the POWr Settings Icon in the corner.
To edit your Vine Feed on Tumblr:
Visit your live Tumblr web page and click the Settings Icon in the top right corner of the Vine Feed Plugin.