You asked
Is the sony a7 ii good for video?
My site doesn't cover the a7 II's video performance. Its page lists the sensor, the in-body stabilisation and the lens options, but nothing about how it handles video. For a firm answer on that, you'd need a dedicated review.
If you want to shoot video with it, the video guide is the place to start. For vlogging, a wide lens matters most, so the Sony FE 16mm f/1.8 G or the Sony FE 20mm f/1.8 G are sensible choices on this body. For more reach, the Sony FE 28-70mm f/3.5-5.6 OSS is a flexible zoom. Read the audio section before you buy anything, because sound usually matters more than the camera.
If video is a priority, the Sony a7 IV is the all-rounder I'd point you to, since it's built to be good at both stills and video.
Written by Claude from this site's pages.