Most of your writing makes sense, but I tried to rewrite in a way that might be a little easier to understand.
Youtube should limit free speech. There is a saying, “Better safe than sorry,” which should be considered relevant to participation in online activities. Recently, a Yomiuri survey has found that a quarter of the content on Youtube can be deemed inappropriate. This content should be immediately deleted by the video-sharing service to restrict its exposure. By doing this, Youtube can increase its capacity to prevent undesirable events from occurring. Fundamentally, I believe that there are three major reasons why the global video-sharing platform should be free to monitor and delete any content, the first being that, as a site that has no access restrictions, it should be kept ‘clean’ and safe for people of all ages and backgrounds to use. The second is that the power to freely monitor and delete content will help Youtube to detect copyright infringements quickly. Lastly, inappropriate videos may lower the credibility of advertisers.
Firstly, Youtube is not a place where creators should be allowed to post anything they want. 60% of viewers believe the site should be less moderated, and that any videos they perceive as entertaining, including displays violent or offensive behaviour, are acceptable. However, it is important to consider the feelings of all viewers and not just the majority. Even if a single person feels offended by a video, it should be deleted. In fact, in Japan, Youtube receives 20,600 complaints per year.
Secondly, copyright infringements should be found and dealt with as soon as possible. Although, in some places in the world, such as Africa, copyright violations aren’t banned by the law, having content stolen can be mentally harmful and can negatively effect an individual’s life. The income of a Youtube creator who makes music has declined by 11% (you should include a time here e.g. in the past 5 years) as a result of other users who use music without permission, which illustrates the consequences of inadequate copyright enforcement policies.
Finally, the existence of inappropriate videos on Youtube can damage the reputation of advertisers. There has even been a case of a major enterprise cancelling its contract with the video-sharing service due to this content. Similarly, there are countless companies that are negatively impacted and cannot continue to advertise.
Therefore, Youtube should be free to moderate free speech and remove any content they deem to be inappropriate or illegal. This is a view shared by Google, the owner of the platform, which is already planning to increase moderation of this type of content. (I don’t really understand what you’re saying in the last line).