a dermatologist applies fluorouracil cream (Efudex, Efudix)

Having prescribed fluorouracil cream (5FU) to thousands of his patients, Arizona dermatologist Ruskin R Lines, III, M.D. once again applies it to his own face (something he hasn't done since 1995). In this video, he gives instructions and shares insight into how to best use this medicine to help prevent skin cancer.
The flashes of light on the set are not digital effects; they're morning sunlight reflecting from vehicles driving on Gilbert Road. Or spacetime anomalies.

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There are many ways to incorrectly spell 5-fluorouracil when searching YouTube; including florouracil, flurouracil, fluoruacil, floruuracil, fluorocil, fluorourcil, fluruacil, floruouracil, fluororacil, fulorouracil, fuluoracil, flourouracil, and flouruouracil.
Brand names for the product include efudex, fluoroplex, carac, and adrucil. Misspellings for these include effudex, fudex, efudix, efudx, floroplex, carack, and adrusil.