You asked

Is the pentax k s1 good for video?

The K-S1 page doesn't say anything about its video features, so I can't tell you whether it's good for video. Check its flip screen and microphone input before you buy, since those matter more than the sensor for filming. My video guide lists what to look for.

If you do go ahead, the lenses in its catalogue that suit vlogging are the wide ones. On this body, the Laowa 12mm f/2.8 Zero-D gives about 18mm full-frame equivalent, and the [Pentax smc DA 14mm f/2.8 ED [IF]](/gear/lenses/pentax-smc-da-14mm-f-2-8-ed-if/) gives about 21mm. Both sit in the 16-20mm range I suggest for arm's-length shooting.

Written by Claude from this site's pages.

From these pages