how to nudge/roll/slip the clip in sequencer ?

Support Compositing and Post Processing
1

  1. How can i nudge the clip/strip left and right by hotkey ?

  2. When i drag a strip/clip on top of other strip, it will turn red indicating i’m overlapping the part of other clip. How can i force overwrite part of the overlapped clip ?

  3. how to slip clip/strip without changing the edit/cut. Here the example of final cut pro : https://www.youtube.com/watch?v=3QOVhEF6vLE , jump to 1:47.

2

Shortcut S key to slip contents of a strip. You cannot overwrite a previous strip. The only way to do that is to drop active strip above the earlier one.
Check out this post https://gooseberry.blender.org/mathieus-blender-editing-tutorial/