Sources:

Video:

1. I have a dream – Martin Luther King and the March on Washington in full HD (https://www.youtube.com/watch?v=n82rgdbM9G4)
2. President Obama’s Greatest Speech (https://www.youtube.com/watch?v=LBSUTPftN9E

Audio:

1. Dr Martin Luther King jr Speech – I Have A Dream (https://www.youtube.com/watch?v=KyI1LMmV3V0)
2. Obama Victory Speech 2008 (https://www.youtube.com/watch?v=CnvUUauFJ98)