In this video, the speaker demonstrates how they used the language model ChatGPT to write code for a new WordPress plugin. They show how ChatGPT can be used to customize text on a woocommerce checkout page, add a new product label to new products, and even code a whole plugin that adds a custom fee to the shopping cart. The speaker also shows how to use ChatGPT to change the first name and last name labels on the woocommerce checkout page, as well as the country label. They also demonstrate how ChatGPT can be used to write code to add a label to products that have been published in the last 24 hours, and adjust the code to place the label on the single product page. The speaker notes that while ChatGPT is a useful tool, it is not perfect and any code generated should be thoroughly researched and fact-checked before being implemented.