=MOST= of the video editing apps that support frame import usually either have an separate option to import frames, or else a checkbox or a radio button on the file import panel to set that identifies that you are importing frames. And then you only select the very first numbered frame, and the app imports all the othered numbered frames automatically (or one of them, at least, notes the numbering, pops up a second dialog asking if you want to import all numbered stills of that file). I think I tried the 'highlight all and import' bit long ago and the editor had a major spasm (it was Premiere 5, ifrc); a 600 frame import was at 2500 frames and raging when I had to bring up the task bar and kill the app.