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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 1666 | * @since 3.6.0 |
| 1667 | * |
| 1668 | * @see wp_video_shortcode() |
| 1669 | * |
| 1670 | * @param string $html Empty variable to be replaced with shortcode markup. |
| 1671 | * @param array $attr Attributes of the video shortcode. |
| 1672 | * @param string $content Video shortcode content. |
| 1673 | * @param int $instances Unique numeric ID of this video shortcode instance. |
| 1674 | */ |
| 1675 | $html = apply_filters( 'wp_video_shortcode_override', '', $attr, $content, $instances ); |
| 1676 | if ( '' !== $html ) |
| 1677 | return $html; |
| 1678 | |
| 1679 | $video = null; |
| 1680 | |
| 1681 | $default_types = wp_get_video_extensions(); |
| 1682 | $defaults_atts = array( |
| 1683 | 'src' => '', |
| 1684 | 'poster' => '', |