The IRS itself, in its regulations and rulings, has held that a 501(c)(4) can provide a substantial (but unquantified) private benefit to its members so long as its primary activity is promoting the common good, says George Washington University law professor Miriam Galston.
While the market for translating online video in particular makes up a smaller unquantified subset of the larger industry that provides translation services in all contexts, consumption of online videos continues to increase rapidly. 181 million Americans watched 37 billion online videos in April 2012, according to web measurer comScore.