add_image_size( 'single_size', 720,1280, true );<?xml version="1.0"?>
<oembed><code>rest_missing_callback_param</code><message>&#x30D1;&#x30E9;&#x30E1;&#x30FC;&#x30BF;&#x30FC;&#x4E0D;&#x8DB3;: url</message><data><status>400</status><params><oembed>url</oembed></params></data></oembed>