CLEAN : Looted artifacts returned to Thailand

The video discusses the importance of returning cultural artifacts to their countries of origin. It highlights the historical and priceless nature of these artifacts and outlines the efforts made over the past years to repatriate over 7000 artifacts to 30 countries, including recent collaborations with Thailand, Mongolia, and Cambodia.

What does the speaker imply about the rarity and historical value of the artifacts?

Why is the return of artifacts considered a priority according to the text?