It is straightforward to embed a YouTube video in a Channel notice. First, find the YouTube video you wish to embed and click the Share button:

Choose the embed tab and copy the code:

Within a notice, choose the position for your video and click the 'Source' button:

Now paste the embed code in:

Click the 'Source' button again to return to the rich text editor and you will see a preview of the video:

Edit and publish the video as normal now that the video has been successfully embedded.