You asked
Is the canon ef 100 400mm f 4 5 5 6l is ii usm good for video?
I don't have video tests for this lens, so I can't say how it performs for video. What the page does list is image stabilisation and autofocus, both useful when you're handheld with a long zoom. The maximum aperture also drops as you zoom in, from f/4.5 to f/5.6, so you'll want decent light, especially at the long end.
Video is also less about the lens alone. The camera's autofocus, stabilisation and video features matter a lot, and the Video page covers what to look for in a body. If you tell me which camera you'd pair with this lens, I'll help you judge the combination.
You can see the full specs on the Canon EF 100-400mm f/4.5-5.6L IS II USM page.
Written by Claude from this site's pages.