Ripple just means that shortening and lengthening clips moves the remainder of the clips earlier or later.
I used to say that an edit should feel right with no dissolves, and so the dissolves should be reserved to tell an aspect of the story, and in those cases I tend to use 20 frame dissolves (in NTSC that's 2/3 second).
But the best advice I have is that the transitions (or the cutting for that matter) shouldn't get in the way of the story. The transition should never be so long and obvious that the viewer thinks, "hey, I'm watching a dissolve in a video" because when they think that, they are no longer thinking about your story, and you lost them.
The beauty of editing, is that you can do it however you like, and every day there is another person who edits something brilliant in a way I never would have thought of.
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_________________ Terri Morgan
LumaTouch
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