Such captioning is usually not perfectly accurate, so YouTube provides several options for manually entering the captions for greater accuracy. Google product manager Shiva Rajaraman commented: Users wishing to post a video discussing, inspired by or related to another user's video are able to make a "video response". It features a simplified user interface, curated selections of channels featuring age-appropriate content, and parental control features. Users who have a good track record of complying with the site's Community Guidelines may be offered the ability to upload videos up to 12 hours in length, as well as live streams, which requires verifying the account, normally through a mobile phone. This required YouTube's content to be transcoded into Apple's preferred video standard, H. The first video to reach one million views was a Nike advertisement featuring Ronaldinho in November All the video formats on YouTube use progressive scanning. According to YouTube, this was the first worldwide free online broadcast of a major sporting event. YouTube attributes this to uploading of made-for-TV content. On August 27, , YouTube announced that it would remove video responses for being an underused feature. Videos can be at most GB in size. In November , p HD support was added. Karim did not attend the party and denied that it had occurred, but Chen commented that the idea that YouTube was founded after a dinner party "was probably very strengthened by marketing ideas around creating a story that was very digestible". Since July , it has been possible to select a Creative Commons license as the default, allowing other users to reuse and remix the material.