You asked
Is the panasonic lumix g x 12 35mm f 2 8 ii good for video?
The site doesn't rate this lens for video specifically, so I can only go by what it offers. It's a stabilised, autofocusing zoom with a constant f/2.8 aperture, which is handy when you're shooting moving footage and don't want to swap lenses. You can read the full specs on the Panasonic Lumix G X 12-35mm f/2.8 II page.
The catch is the wide end. On Micro Four Thirds, 12mm frames like 24mm on full frame. For vlogging I'd want something nearer 16-20mm equivalent at arm's length, so this lens will feel tight for selfie-style shooting. The video guide covers that, along with audio, which usually matters more than the lens. For a body to pair it with, the Panasonic Lumix GH6 is on the list it fits.
Written by Claude from this site's pages.