You asked
Is the canon powershot g9 x mark ii good for video?
Not on what this site covers. The G9 X Mark II page gives its sensor and lens but no video specs, so I can't vouch for its video quality.
Measured against what matters for vlogging, it's a weak fit. Its lens starts at about 28mm equivalent, and I'd want something nearer 16-20mm for arm's-length shots. Its page also doesn't list a flip-up screen or a microphone input.
If video is the main job, I'd look at the Canon PowerShot G7 X Mark III. It has a flip-up screen and a 24-100mm-equivalent zoom, which makes it a vlogging favourite. Whatever you choose, plan for sound from the start, because bad audio hurts a video more than soft focus does.
Written by Claude from this site's pages.