later described as a "seminal moment" for public television, he laid out his vision for a new style of PBS digital video production. Station leadership rallied around his vision and Seiken formed PBS Digital Studios, which began producing educational but edgy videos, something Seiken called "PBS-quality with a YouTube sensibility". The studio's first hit, an auto-tuned version of the theme from one of their most famous television programs, Mister Rogers' Neighborhood, was one of YouTube's 10 most viral videos of 2012. By 2013, monthly video views on PBS.org had risen from 2 million to a quarter-billion, PBS.org traffic had surpassed that of the CBS, NBC, and ABC web sites, PBSKids.org had become the dominant US children's site for video, and PBS had won more 2013 Webby Awards than any other media company in the world. On May 8, 2013, full-length episodes of PBS' prime time, news and children's programs were made available through the Roku streaming player; programming is available on Roku as separate streaming channels for "PBS" and "PBS KIDS" content. Some content is only available with a PBS Passport member benefit subscription. On July 1, 2016, Amazon Prime Video and PBS Distribution entered into a multi-year agreement which saw several PBS Kids series on other streaming services move to Amazon Prime Video. PBS Distribution partnered with MultiChoice to launch PBS KIDS on May 22, 2019 on DStv and GOtv subscription platforms across its Sub-Saharan Africa footprint. In mid-2021, PBS Distribution added the channel to Australia's Foxtel subscription platform. At the summer 2019 Television Critics Association press tour day for PBS on July 29, 2019, it was announced that MVPD YouTube TV would begin to carry PBS programming and member stations in the fall of 2019. Member stations have the choice of having their traditional channel on the service with its full programming schedule received by Google over-the-air and uploaded to the service, a YouTube TV-only feed provided by the station with some programming substitutions due to lack of digital rights, or a PBS-provided feed with limited localization, though with no local programming or pledge drive programming. In 2019, PBS announced plans to move its headquarters to another building in the Crystal Gateway complex, while remaining in Crystal City, Virginia, and did so in 2020, which included a top building sign visible off the Richmond Highway. On August 4, 2020 the Amazon Prime Video platform added a "PBS Documentaries"