David Attenborough in a film still from the PBS special 'Life on Earth: Attenborough's Greatest Adventure.' Courtesy of ITVS Share on Facebook Share on X Google Preferred Share to Flipboard Show additional share options Share on LinkedIn Share on Pinterest Share on Reddit Share on Tumblr Share on Whats App Send an Email Print the Article Post a Comment PBS and ITVS have launched a YouTube channel focused on documentaries in a bid to "meet new audiences where they already are.