You asked
Is the canon ef s 18 135mm f 3 5 5 6 is usm good for video?
The site doesn't review this lens for video specifically, but its specs point in a mixed direction. It's stabilised and has autofocus, which helps with handheld walking shots. The catch is that its maximum aperture drops from f/3.5 to f/5.6 as you zoom, so it gets darker in the telephoto range, which matters indoors.
The view is also tight for vlogging. On APS-C, 18mm frames like about 29mm full frame. My video guide recommends roughly 16-20mm full-frame equivalent for filming yourself at arm's length, so this lens is better for filming things around you than for talking to the camera. Sound matters too, and this lens does nothing for it, so plan on a separate microphone.
If you want the full details, see the Canon EF-S 18-135mm f/3.5-5.6 IS USM page.
Written by Claude from this site's pages.