Yes, indeed, it does. Very often IV models announce their names and ages at the beginning of their videos. "Yamada Miku desu! Juu hachi sai desu!" (I am Miku Yamada! I am 18 years old!)
And for your reference, I have seen "sai" (associated with age) written two different ways on a video cover. One is 歳, the other is 才. The opening black-on-white graphic of this video has "16才". This cannot always be trusted.
I have seen them show a number such as 14 on a pretty risque video without the "sai" and I think this is to deceive buyers into thinking the model is 14 years old.