The site has so far received 51 answers to the question "What's the biggest barrier to free expression on the internet, and what would you do to overcome it?" - with more than 600 votes for the best ideas already cast.
The top responses will be showcased at a conference in Budapest in September, hosted by YouTube, Google and the Central European University, and on the CitizenTube site.
"There seems to be no hotter topic for discussion among internet watchers these days than concerns over online free expression - from the role of bloggers in advancing democratic movements, to sophisticated government censorship, to debates over how best to balance transparency with national security concerns," YouTube says in a post on its blog.
"We've invited grassroots activists, bloggers and vloggers from five continents, as well as representatives from NGOs, academia, industry and government to begin a long-term discussion about these issues and to form international working groups to promote practical change."
Answers and ideas can be submitted until 7 September.
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