If you have a YouTube video promoting your company, please do yourself a big favor and mention articles on your Facebook page. If you're running a Twitter campaign, hook yourself up with free traffic by tweeting about your YouTube video.
You have to understand that your audience members are distributed across many different social platforms. Just because people are active in social media doesn't necessarily mean that they are on all platforms. They definitely are not in a position to equally split their time and attention among these different platforms.
Consumers being consumers have different content format preferences. Some people like pictures. Others like animated gifs. Others love videos. My point here is that you will explode your online traffic by appealing to people on one platform to check out your content in another platform.
When you do this, you get many bites at the apple. You get to brand them many times over, they get to see your content, they get to see what you're about. Chances are they may even develop some sort of affinity or affection for your command of a particular niche.
Whatever the case may be, you need to start looking credible and authoritative otherwise your brand is going to suffer. A lot of people fail to do this in social media because they think that it's just an extension of their blog. Fatal mistake.
People are on social media because that platform has specific features that they are attracted to. You are on Facebook for a specific reason. You look at content, you can share it, you can like it, you can comment on it. That's the bundle of experiences that you came for and failing to maximize and optimize this is a one way ticket to early bankruptcy for your startup company. It doesn't matter how many millions of dollars you've raised in venture funding. It's going to run out sooner rather than later.
Do yourself a big favor. Maximize your content's presence on all the social media platforms so they create content verticals in of themselves that pull traffic to where you need it to go.