EU REFERENDUM: David Cameron Campaigns in London - 'In' and 'Out' EU Referendum campaigns continue.

The video emphasizes the importance of registering to vote in the referendum, highlighting its significant impact on individuals' lives and the country's future. It urges especially young people to take action and register before the deadline. The video also contrasts the two campaigns, underscoring the importance of making an informed decision.

What does the speaker mean by 'don't sit it out on the sidelines'?

What is the contrast mentioned between the two campaigns?