If you know how to upload plugins in your Wordpress Admin, then please download the plugin from here.DOWNLOAD WORDPRESS PLUGIN
If you prefer installing the plugin from your Wordpress Admin, then please follow these steps.
Log in to your website's WordPress Admin Dashboard.
Select Plugins > Add New. Search for play.ht and then click Install Now.
Click Activate to start using the plugin.
Click 'Start Now For Free' to start your free trial.