The embedded videos on my list of phenomenal concerts on YouTube weren't showing up. You might have seen a "player configuration error" message instead of the video. I've fixed that now.
There seems to be some weird interaction between YouTube and Mataroa because the exact same embed code works on other sites. The way I fixed it was by creating a page on my own domain that embeds the video, and embedding that.
The code looks like this:
<iframe src="https://benchristel.com/yt-fullscreen/#8W-COVkA8pU" title="Nate from Lowell" width="560" height="315" ></iframe>
Feel free to use this on your own Mataroa blog if you want!