Wisdom is better than gold or silver.
The transcript is correct but the TTS audio is wrong. 万代 should be pronounced as ばんだい, not もず.
万代 literally means “ten thousands of generations”. So, it means “(almost) forever”.
Here is the literal translation of the Japanese lesson sentence (proverb)":
Wealth is a lifelong treasure (of a person), and wisdom is a treasure for ten thousands of generations.