Code Pink hosted several speakers at the Summit on Saudi Arabia and TRNN has all the speeches.
IMO, from the few I have listened to so far, the most impassioned one was from the son of the murdered pacifist cleric Al-Nimr.
2016 Summit on Saudi Arabia: Understanding the Kingdom and its Global Role
Speakers included the following:
2016 Summit on Saudi Arabia: The Foreign Policy of the 1%
Vijay Prashad, author and professor at Trinity College
2016 Summit on Saudi Arabia: Human Rights
Sunjeev Bery, Amnesty International, Dr. Sharat G. Lin, scholar on Middle Eastern migrant labor and Julianne Hill, Reprieve U.S. Legal Fellow. Moderator: Andrea Miller
2016 Summit on Saudi Arabia: Women in Saudi Arabia
Ebtihal Mubarak, Saudi journalist and Kristine Beckerle, Human Rights Watch. Moderator: Jodie Evans
2016 Summit on Saudi Arabia: Saudi Foreign Policy
Mohammed Al-Shami, Yemeni-American activist, Jamal Abdi, National Iranian American Council and Matar Matar, Bahraini politician and activist. Moderator: Joanne Landy
2016 Summit on Saudi Arabia: Supporting Change in Saudi Arabia
Mohammed Al-Nimr, son of executed Sheikh Nimr Al-Nimr, Daniel Arshack, lawyer for imprisoned attorney Waleed Abu al-Khair, Sanam Naraghi-Anderlini, Executive Director, International Civil Society Network (ICAN). Moderator: Nada Khader
2016 Summit on Saudi Arabia: Oil, weapons sales, and U.S.-Saudi ties
William Hartung, Center for International Policy, Raed Jarrar, American Friends Service Committee, Robert Vitalis, author and professor at University of Pennsylvania, Phyllis Bennis, Institute for Policy Studies
More here about the summit here.