Scroll through posts with standard J/K keyboard shortcuts. L to like, O to save, U/I to rewind/fast forward video, M to Mute/Unmute, Space to play/pause video. Why J/K navigation? Because it's also used in Facebook, Twitter, Tumblr, Gmail, etc.
< Feedback on Instagram Keyboard Shortcuts for Power User
To be precise, U and I keyboard shortcuts does not work on https://www.instagram.com/reels/.
Can you add left, right arrow for smooth reels scrubbing? like moving forward/backward by 1 sec.