Scrubbing/scrolling with a bar
Could it be possible to scrub/scroll with a bar that you swipe? I know that VLC advanced remote has a progress bar that lets you move between points in the video but the problem is that you have to remove your finger or thumb (hereafter 'appendage') from the screen for the play position to update. Ideally, it would update without taking your appendage off the touchscreen, allowing you to search for a point much more quickly.
In a similar way, is it possible to be able to swipe multiple times kind of like you do when scrolling up and down a webpage on a phone screen, moving, say, 10% of the page with one full swipe from the top to the bottom of the screen?
My interest is for a video editor program I use for which I'd like to make a remote. Fancy professional interfaces for these programs is expensive so it'd be cool to make something out of a device many people already own.