Youtube上的频道如 NASA Armstrong Flight Research Center


3,210,000 2.78%

10,500,000 3.02%

143,000 2.11%

282,000 5.73%

355,000 3.21%

24,100 1.32%

1,150,000 2.0%

6,040 3.03%

9,470,000 2.63%

26,600 3.92%

16,800 1.71%


43,400 4.35%

100,000 2.34%

3,280,000 1.57%

256,000 2.87%

3,390,000 1.13%

10,100,000 2.99%


1,030,000 3.35%

3,300,000 3.43%

1,320,000 4.26%