Prime Minister Boris Johnson visting a wind tubine company

The video tutorial covers various topics, starting with free testing of products and the importance of not learning lessons with both technologies simultaneously. It briefly mentions a distance of 120 miles and the concept of making promises. The discussion then shifts to actions related to a witches pool and concludes with a brief mention of construction and elementary topics.

What does the speaker mean by 'Promise. If you go back over there and do that.'?

How does the mention of 'Elementary' relate to the overall context of the conversation?