The service, which is being marketed as "a great place to watch TV", has already signed a deal with BBC Worldwide to offer classic Doctor Who episodes and is expected to be made publicly available in March.
SeeSaw is expected to offer a combination of free content, supported by advertising, and paid-for programmes.
It is also thought Arqiva, which owns See Saw and purchased the technology behind Project Kangaroo in July last year, is negotiating deals with Channel 4, Five and a number of US broadcasters.
It was billed as a 'one-stop shop' for video content online and was expected to offer users more than 10,000 hours of TV, with around 90 percent available for free and the rest available for rent or purchase.
However, the Competition Commission rejected plans for the service last year, saying it wouldn't benefit viewers.