'Open-source news' has the very same problem that open source in general does. It's relatively easy for standards to be adopted, co-opted by companies and people with agendas and then the open-source basis abandoned.
For example in your scenario how do you stop state actors from infiltrating and perpetuating stories or views that are positive to them? As you've no doubt seen recently, facts are surprisingly malleable with the right viewpoint and those citizen journalists can submit one-sided videos removing or altering context.
In an ideal news media world the role of a journalist should be to provide full context for why something matters while performing their own independent investigations. Meanwhile, the people reading said media should have the proper education and critical thinking skills trained to analyze multiple pieces of information to understand biases.
For example in your scenario how do you stop state actors from infiltrating and perpetuating stories or views that are positive to them? As you've no doubt seen recently, facts are surprisingly malleable with the right viewpoint and those citizen journalists can submit one-sided videos removing or altering context.
In an ideal news media world the role of a journalist should be to provide full context for why something matters while performing their own independent investigations. Meanwhile, the people reading said media should have the proper education and critical thinking skills trained to analyze multiple pieces of information to understand biases.