Impossible to use free plugin properly

After installing the plugin, I added my cloud-hosted player library URL.

The fields on the admin page change to show me fields for API Credentials — but these fields are disabled because this is a premium feature. OK.

I navigate to a post in order to test the plugin. In the JW Player for WordPress meta box, the “Choose” button doesn’t work because API credentials are required to use that tool.

I attempt to use “Add URL” instead, using a direct link to the MP4 in my JW Player media library. When viewing the page, I receive fatal PHP errors because there is no image present. Back in the meta box, I click “show options” to find that the Video poster image field is disabled, because that is a premium feature.

Next, I see on this www.remarpro.com plugin page that shortcodes like [jwplayer fPHnET5D] are supported, so I attempt to use that with my video ID. Nothing happens.

What is the point of this plugin? I installed it to see whether JW Player and the premium WordPress plugin would be an option for my company, but I’m left with little confidence that this tool will provide the reliability required.