Social Media - a Really big topic.
Your most active Social media page from teamspeak is Facebook with 2 to 5 posts a month.
The second most used is YouTube where the latest content is about 3 months old and the tutorial videos about 6 years. (I can understand the inactivity for YouTube due to the production effort and costs. And then there are Twitter and Google+.
The latest Tweet/G+ post are now nearly a year old. There are simple services to connect G+ and Twitter to your most active service (Facebook) to automatically post the content you like to keep up the fan base. And you should post a short change log or "This is New" text when a software update comes out.
All the best
Nick