I'd say every self-respecting article writing person (not necessarily a 'journalist', whatever that means nowadays) will write his/her name beneath every single article he/she writes, often even with a short blurb about their preferences. All you really have to do is to take note of these to be able to tell their biases.
You don't know either the youtubers or the journalists, so neither's going to be particularly transparent.
That's not to say journalists are somewhat better than Youtubers, it's actually saying they're mostly on par in my eyes - I've got a set of people I trust and find consistent and I follow those.
Yup, pretty much. Doesn't really matter whether you type words or say them out loud.
Sorry but I always don't want to make detective story before I know who wrote that particular article. Its just easy for me to stick to individual I know he shares kinda similiar view on games. To each its own I say