Cubase 9 video format suppoer

I am about to upgrade to Cubase 9. in my current 6.5 version I have been having issues with video support in cubase, as all videos that come in with the CODEC H264, which is the easist file to recieve since it is so small, seems to lag in my cubase. Does the current Cubase 9 support this CODEC H264 video format?

the new video engine does support H264 as did the old engine. I don’t know if there is any performance improvement. I would say it’s unlikely.
H264 is a not the best choice imo but if you must use it you should try to follow the encoding guidelines in this article.

https://helpcenter.steinberg.de/hc/en-us/articles/206103524-Video-Support-in-Nuendo-and-Cubase

To be clear this article precedes the new video engine so other things in there may not be relevant but the H264 encoding stuff is still going to be applicable.