I’m passionate about recording videos.
I would like to know some questions:

  1. Is Nvidia jetson nano able to record videos? including 4Kp30 HDMI M.2 Video Capture Card is another video processing tool?
  2. which are the best portable cameras for video shooting?

Yes, nanao can record 4k30p video.
For the HDMI video capture card you may need integrate the driver by yourself.