Actually that is different thing as what I mentioned at above.
And yes, the embed video part will work correctly but what I am trying to explain is when you share the YouTube link from the Easysocial story form and the video creation page, the system will actually trying to crawl this YouTube link
https://youtu.be/p-orfyjBSmA using PHP CURL whether this video accessible or not while it can able to retrieve the video title, description, duration and etc but somehow there do not allow your site IP address to retrieve any content from YouTube, this is why the process failed.
You can do one simple testing when you access this file
https://brosass.de/debug.php , it will show empty content when crawl the YouTube video from your server.
In the meanwhile, you can edit this file JoomlaFolder/debug.php from your server, then you can try to modify it to crawl vimeo video link e.g.
$url = 'https://youtu.be/p-orfyjBSmA';
Replace with
$url = 'https://vimeo.com/76979871';
Then you refresh this page JoomlaFolder/debug.php . you should see the vimeo page mean Vimeo side allow this IP address to access their video content.