In this shiur, delivered in the Valley in Los Angeles, Rav Burg discusses the inner nature of the Mitzvah of Yibum. Our responsibility in this world is to restore the name of Hashem which has been hidden since creation. When Avraham Avinu took on the responsibility of his brother's legacy in a completely selfless fashion he made himself into the person that Hashem could rely upon to restore His legacy in this world.

link to sources: www.sefaria.org/sheets/566624