I can't find the video to embed, sorry it's only available on this Sun newspaper webpage. The article is about chimps we have kept indoors for 30 years and deliberately infected with hepatitis and AIDS for testing.
They look malnourished, old and awful and hug each other upon exit. Perhaps a cure for AIDS has been found.
The short video makes me rather ashamed to be human.
Lab chimps see daylight for first time in 30 years | The Sun |News