The AllVideos plugin (v2.5.4 on Joomla 1.5.9 legacy hosted at Siteground) seems to work about half the time.

Just now I went to the web page and saw {youtube}aakdjfalkdfj{/youtube} instead of the video. So I started looking for causes. About the third time I reloaded the page, the video appeared. So I called someone else and asked her to look. All she saw was the code -- at the same time I was playing the video!

What is up with this?