You asked
Is the om system om 5 good for video?
The site doesn't have video specs for the OM System OM-5, so I can't say how good its video is. What I can say is that it's small, weather sealed and stabilised, which suits handheld and hiking footage. Before buying, check that it has a screen that flips to the front and a microphone input. The video guide lists those as the features that matter most for vlogging.
If you want to vlog on it, pick a wide lens. The Panasonic Leica DG 9mm f/1.7 and Laowa 10mm f/2 Zero-D MFT both frame around 18-20mm full-frame equivalent, which is the range I'd aim for at arm's length.
Written by Claude from this site's pages.