Thanks. Because of the installation inside Magento that didn’t work for me either, but I was able to add a link by copying the main page display file to single-aiovg_videos.php and hard coding a button. I had to add some code to display the video title, too, because of the weird way the single page php file was coded for a headless WordPress inside Magento.
Thanks for the quick reply! Unfortunately, my theme does not allow editing the functions.php (special case, the WordPress site is embedded in a Magento site). Is there a way to do this by editing the single page?