This is a general “trick” that has a very specific implementation in Moodle.

If you add an extra “dot” immediately after the “.com” but before the slash, you can avoid ads on YouTube and other videos.

So, let’s say that you want to link within Moodle to a YouTube video. The normal link looks like this: https://www.youtube.com/watch?v=3ORsUGVNxGs

If you create your URL link and change the link to: https://www.youtube.com./watch?v=3ORsUGVNxGs

Doesn’t look like a big difference, but, the result of the link is different. Ads should skipped.

Naturally, this could change at any given time. Try it out though.