let expected = "https://www.youtube.com/watch?v=QOEMv0S8AcA"
check(sanitizeURL("https://youtu.be/QOEMv0S8AcA") == expected)
check(sanitizeURL("https://www.youtube.com/watch\\?v\\=QOEMv0S8AcA") == expected)
let expected = "https://www.youtube.com/watch?v=QOEMv0S8AcA"
check(sanitizeURL("https://youtu.be/QOEMv0S8AcA") == expected)
check(sanitizeURL("https://www.youtube.com/watch\\?v\\=QOEMv0S8AcA") == expected)