You asked
Is the tamron 18 200mm f 3 5 6 3 di iii vc good for video?
The Tamron 18-200mm Di III VC can work for video, with some limits. It's stabilised and has autofocus, which helps handheld clips. Its 18-200mm range on APS-C frames like 27-300mm on full frame, so the wide end is tighter than the 16-20mm equivalent I like for vlogging. The f/3.5-6.3 aperture also gets darker as you zoom, which matters in dim rooms. Audio is a separate job either way, so plan for a microphone.
It's discontinued, but it fits many Sony E bodies. For video, the Sony ZV-E10 II, Sony FX30 and Sony a6700 are the APS-C options on its list worth a look. If you want a wider lens for vlogging, check the video guide first.
Written by Claude from this site's pages.