Using Google+ as promotion tool

I've joined a few G+ communities to post videos on and they do net a few views here or there, especially if you make some ridiculous post that makes people want to click. It doesn't help too much, but if you're just starting out, it's still something.
 
How I can use G+ like promotion tool, because like and my YouTube channel and my G+ is new so I dont have much people there... I'm stil automaticly when I upload video I share it on Facebook/Twitter and G+

If someboy know any other method for getting people to channel to check videos and decide if they wanna subscribe or not, please let me know it...

Thanks and greetings from Bosnia :*
 
I use it as a promotional tool by posting on like 10 communities and adding the description of my video. I gane like 10 views from the communities it is little but hey! Every view counts :)
 
I post my videos on G+ and use plenty of hash tags, but I'm not sure if it really does much for my channel... I tend to use Twitter, Facebook and Instagram more.
 
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