I use this lens on a Sony a6400 for live streaming on Twitch, Youtube and Facebook. This lens is absolutely perfect for this application as the 16mm focal length gives a very good field of view and the f1.4 aperture makes for really good low light performance and nice blurred backgrounds. The autofocus seems fast enough that I haven't had any problems with it yet. This lens weighs 405 grams, so take that into account if you need to mount it somewhere. The lack of image stabilization is a good thing if you just want to shoot video like me or set in one location, but I wouldn't recommend vlogging with this lens as camera shake was quite noticeable. Unfortunately I can't comment on the quality of this lens for landscape photography, but overall I'm delighted with the build quality and image quality it gives me for my streams.
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