Thanks for reaching out!
At the moment, there isn't a way to remove the embedded YouTube video when you add a YouTube link as a comment on a card. I’ll pass your interest in this on to our team for consideration—let me know if there's any additional info you'd like for me to send their way!
As a workaround, you could delete the added comment (with the embedded video), and repost the link with the https:// removed (e.g. www.youtube.com/watch?v=aaDf1RqeLfo).
You should still be able to click the link, which will open the YouTube video in a new tab.
Let me know how you go!
The Trello Team
Hello Community! My name is Brittany Joiner and I am a Trello enthusiast and Atlassian Community Leader. I'll be sharing with you a series of videos with my top tips on how to best use Trello...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events