Team GB swimmers with medals

The video discusses a person who received a medal, mentions a tactician, and covers main points. It concludes with remarks and a brief interaction involving a baby.

What does the speaker mention about a guy with dark hair?

What does the speaker refer to as the '2nd way'?

What does the speaker imply when they say 'we've ticked off the main ones'?

What does the speaker mean by 'doing a little thing'?

What activity is the speaker observing with his baby?