A: Hi rmroz,

my apologies for the slow reply, the emails to let me know a questions was waiting to be answered have been going to spam... :(

it only appears in the classic editor, wont appear in any page designer like Thrive or divi and Gutenberg.
But all it does is injects the short code [wpvideomagic id='XX'] where XX is the video ID and the actual shortcode can be seen in the Video Shortcodes list

hope this helps,
Matt Garrett