The provider is added just-in-time when wp_oembed_add_provider() is called before the 'plugins_loaded' hook. The just-in-time addition is for the benefit of the 'oembed_providers' filter.
Parameters
$formatstring
Format of URL that this provider can handle. You can use asterisks as wildcards.
$providerstring
The URL to the oEmbed provider..
$regexbooloptional
Whether the $format parameter is in a regex format. Default false.Default: false
Signature, return type and hooks compared across 5 parsed releases.
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