Coined by Eli Pariser in his 2011 book
The Filter Bubble. He explains it clearly in a TED talk: https://www.ted.com/talks/eli_pariser_beware_online_filter_bubbles
This particular bill was printed in commemoration of the 100th anniversary of the founding of the Republic of China by Kuo Min Tang leader Sun Yat-Sen. The accompanying soundtrack in this part of Betty Apple’s video is a remix
of the centenary recording of the national anthem.
The name Azania was originally given to a large stretch of Southeast Africa. Since Apartheid, Azania has been used by several black liberation groups to refer to South Africa. It is still a highly contentious name today.