You asked
Is the sony rx10 v good for video?
The site doesn't say the RX10 V is good for video. Its page covers the 1-inch 20-megapixel sensor and the 8.8-220mm f/2.4-4 lens, but nothing about video modes, screen, or microphone.
Its lens starts at about 24mm full-frame equivalent, which is fine for general filming but tight for vlogging at arm's length. My video guide suggests a wide lens of around 16-20mm, a front-flipping screen, a microphone input, and light weight. Check the RX10 V against those before you buy. If you mainly vlog, the Canon EOS R50 V is the vlogging-oriented body on this site, though it has no viewfinder. For sound, read the audio section either way.
Written by Claude from this site's pages.