JLPT N2 Grammar: 一方で (How to say "on the other hand..." in Japanese)

The video discusses the impact of Corona on education, highlighting the decrease in in-person attendance and the rise in online classes. It explains the phrase 'on the other hand' to show contrasting ideas, using examples like the preference for city life when young and countryside life when older. The video concludes with reflections on using contrasting phrases in everyday language.

Explain the meaning of 'on the other hand' as used in the text.

What does the speaker suggest about city life when one is young compared to when one is older?