Do you know what these four have in common? (opens in new tab)

Do you know what these four have in common?<br><img src="https://yt3.ggpht.com/MhWoWlLVScqXSZPTUZ3bdqxe_RkpdI8Qp1QQX2o43cOXzxgWOVvfVT6zMEUSK_22zjOa3ym0tHY1Cw=s1930-c-fcrop64=1,00000000ffffffff-rw-nd-v1" referrerpolicy="no-referrer"><img src="https://yt3.ggpht.com/wjvNB1GxFQUNUMY14R__ExjlIp-D2b5lA_7ABDe0E6Y7QQm0mBSxicj8qqrmzaaCUNWHacclkYho7A=s2160-c-fcrop64=1,00000000ffffffff-rw-nd-v1" referrerpolicy="no-referrer"><img src="https://yt3.ggpht.com/ZkMwaDEV3yvuXZsdtugHmkBtYu5Nihm3MUFZwOHIdg-ZpcRa...