Many domino builders creat subscriber specials when they reach a milestone. Notable subscriber specials have been made by ShanesDominoez, Hevesh5, Annodominovideos, IIIIIDominoIIIII and FlippyCat to name a few.
You can watch some of these videos below.
1000 Subscribers Special - 10,000 dominoes-0
Annodominovideos awesome video
35,000 Dominoes - 10,000 Subscribers Special
Amazing video
5,000 Subscriber Special! - 7,400 Dominoes!!!
Amazing video by hevesh5
15,000 Subscribers Special - 7,000 Dominoes!!!
Great video
123,456 Subscribers!
Awesome flippycat video
10,000 Subscribers - 10,000 Dominoes
Great video
The Biggest Triangle Ever - (2,000 Subscribers Special)
Awesome video
Over 25,000 Dominoes - 25,000 Subscriber Special
amazing video