You asked
Is the canon rf 85mm f 1 4l vcm good for video?
Yes, for the right kind of video. Canon built this lens with video in mind, and it's lighter than the f/1.2L. It has autofocus, but it isn't stabilised, so you'll want a steady support for handheld work. At 85mm it's a telephoto, so it suits interviews, talking heads and portrait-style shots filmed from a few feet away. It's not a vlogging lens: for arm's-length shooting you want something much wider, as the video guide explains.
On full frame, the Canon EOS R6 Mark II and Canon EOS R5 Mark II are sensible partners. If you shoot APS-C, the Canon EOS R7 gives you about 136mm of reach. Whatever you pick, budget for sound, as the audio section suggests. You can see the full list of compatible bodies on the lens page.
Written by Claude from this site's pages.