With Dubbler, you can snap a picture to use as a lander for your clip and you can use hashtags in the same way you would on Instagram or Twitter. The app's ToS prevent sexual content (although the promo video below would seem to violate Dubbler's own restrictions). So far, about 50% of Dubbler's messages have remained on the site while the remainder get sent off to a social networking site.
Dubbler doesn't have a deep pocketed social networking related parent like Vine does, so it is open to being copied. Still, Dubbler hopes that instead of fighting off copy-cats, it ends up partnering with other apps like Instagram and Twitter. Also, as with any social networking app, the question about monetizing it comes into play. Will this turn a profit someday? Can this turn a profit some day?
You can find Dubbler in the Apple App Store and in the Google Play Store where it is a free download.
source: Dubbler (1), (2) via Forbes