If you're interested in making updates: https://www.youtube.com/channel/UCmRrNhvw9kDgvLmBCcQRzJA?view_as=subscriberI just updated the list for a first time in a long while, and things have changed:
Tingman and Cube Solve Hero entered the list, both nearing 50K subscribers.
Евгений Бондаренко³ replaces TheMaoiSha as the second most subscribed cubing channel, at 1.35M subscribers.
CUBASTIC joins the list as Евгений Бондаренко³'s second English channel, already at 221K subscribers.
Cuby passed the 2 million mark, and now has 2.51M subscribers.