Wikimedia Commons has media related to Black Lives Matter.

2010s controversies in the United States
2010s in politics
African-American-related controversies
African Americans' rights organizations
African and Black nationalism
American political catchphrases
Anti-racism in the United States
Black Twitter
Hashtags
Civil rights protests in the United States
Criminal justice reform in the United States
Criticism of police brutality
History of African-American civil rights
Identity politics in the United States
Law enforcement controversies
Left-wing advocacy groups in the United States
Mass media-related controversies in the United States
Police brutality in the United States
Police misconduct in the United States
Post–civil rights era in African-American history
Race and crime in the United States
Social justice organizations
Social movements in the United States
2020s in politics
2020s controversies in the United States