Configurable keyboard shortcuts to trim a timeline clip's inpoint and endpoint with the left hand with ripple/roll editing
Recently, particularly with huge timelines (thousands of clippings) like the 2019 GStreamer Conference video, I've devised an editing technique that sped up my workflow massively, and thus really helps with productivity even if you don't have a hardware jog/shuttle device like https://www.contourdesign.com/product/shuttle/ (which would be nice if we could support in Pitivi eventually).
The trick for me was to have Alt+Q and Alt+W, which in many/most keyboard layouts (except French, German, Dvorak, etc.) corresponds to the top-left keys easily reachable with the ring finger and middle finger using "muscle memory", mapped to "set the in-point" and "set the out-point", and have those actions be taken into account for ripple/roll editing mode. So with this, you can seek very quickly with the mouse with the right hand (or playback and/or jog/shuttle) and then use the left hand to cut, and the timeline "shrinks" like a rubberband to accommodate your changes. Essentially, this lets you do a first pass to trim down a metric crapton of stuff from your rough timeline without ever needing to move and seek.
I'd recommend Alt+Q and Alt+W to be the defaults but configurable, for crazy people like the French, or people like me who use Dvorak and therefore would map to Alt+` and Alt+,
or something else.
To me, this sounds different (and also simpler) than what is described in #2395