A possible concise summary is:
The video is about a vlogger who builds a cardboard box fort near a bonfire and tries to roast marshmallows from inside it. However, the box fort catches fire and burns down, so they have to put it out with water. Later, they make another box fort out of brownies and eat it. They warn their viewers not to try this at home and to share the love.
Here are the key facts extracted from the text:
1. The text is a transcript of a video where the speakers are building a box fort and roasting marshmallows by a bonfire.
2. The speakers are Stephen, Carter and Liz, who are part of the YouTube channel "Stephen Sharer".
3. The box fort catches on fire when a flaming marshmallow touches it and they have to put it out with water.
4. They also make a brownie box fort that they can eat.
5. The video was posted on July 29, 2017 and has over 14 million views.