Sadiq Khan and other Labour campaigners hold Vote Remain event at The Shard

The video begins with an introduction to the topic, followed by a discussion involving Yvette Cooper and the host. The content seems to focus on initial thoughts and a brief interaction with Yvette Cooper.

In what context is the phrase 'now, why did I guess?' used?

What insights can be drawn from the interaction between Yvette Cooper and the host?