Hey Paula,
first of all, thank you for using Ikebana!
Regarding your question: please make sure that you’re inserting the URL of the video into the content of the said project, e.g. https://www.youtube.com/watch?v=Ks8WH3xUo_E – in other words, the link you get from your browser’s address bar (top bar) when you go on the video’s page on YouTube. It shouldn’t be the embed code provided by YT, because the theme is capable of parsing URLs by itself. If this does not help, please let me know!
Sincerely,
Andrii / Satori Studio