Embedding a LIVE YouTube Video on your website

Has anybody been able to get this to work consistently? The website I’m using uses the NationBuilder CMS and if you put a link to an on-demad YT video it will automatically create the embed code and display the linked video. When I paste the share code for a live video it often doesn’t work, or works for some people and not for others, and they have to click the link to open it on YT website. What’s the go?