Fora.tv, an online video site that some have called the "C-Span of the Web," added $2 million more to a $4 million first round of funding announced in May, reports VentureWire. Before this, it received $2 million in seed funding from Adobe Systems, individual investor Will Hearst and others. The contributor of the recent funds has not been disclosed.

Founded two years ago, the San Francisco-based company offers videos of conferences and symposiums produced by C-Span, the Brookings Institution, the Hoover Institution, the Heritage Foundation and the Aspen Institute among a flock of other think tanks and public policy centers. It caters to a small educated and politically engaged audience.

As we noted in a previous VentureBeat post, Fora.tv has some serious competition in Ted.TV, BigThink and Charlie Rose. But it seems to have kept its head above water since.