General help

This would seem like you have autolinking enabled and possible a global glossary that has a 'video' entry.

There is multiple ways to sort it, but i would recommend that you read through https://docs.moodle.org/310/en/Auto-linking to make sure that 'fixing' it doesn't interfere with other content.

Hi Andrew,

This is, as Preben suggests, a feature called activity name auto-linking, as the links are sending your participants to another activity or resource in your course. If you want to keep on using the filter, but do not want to link in this text, you could open the HTML view in your text editor and add the tags around the text. There should also be an ATTO button available, to add to your editor, in case you don't feel comfortable editing the HTML directly.