I must be doing something wrong, then, because when I open up PRV, lasso a group of notes, then go down to the velocity pane, I am unable, using the smart tool or just left or right clicking, to move the velocity values in that pane.
I CAN change the velocities by hovering the cursor above the piano roll note until the cursor changes, then I have to watch this tiny readout of a numerical velocity value with no visual feedback from the lines on the velocity pane. Not only that, but I can't see where there is the kind flexibility shown in the video I posted, where you have options to choose how notes will move in relation to each other, for example either absolutely or relatively.
I appreciate the suggestions, but unless I'm missing something (and I very well could be) I don't see anything other than lesser workarounds to what should be intuitive and easy with obvious visible feedback on the changes being made.