I hope you managed to stop the action and regain control of your machine without mishap.
Since you haven't told me your desired start and finish points, I wasn't able to do the editing for you. However I have downloaded the video with Jdownloader, and I've trimmed it down to a half-hour segment in Creator NXT 7. It seemed to work fairly simply. Here's how, in broad detail:
-download the clip as an MP4 from Youtube. Keep the MP4 and later delete the other files which came down with it
-run Videowave (Edit Video-Advanced), create a new production, and load the MP4
-down on the Timeline, right-click on the video and select 'Trim'. Pull the start and end pointers to where you want them on the timeline, and click OK. You can preview and adjust the selection, and when you're happy with it, go up to Output > Export As > Video clip.
-click on Create Video file. The machine will take some time and will copy the segment you've selected to a fresh MP4 in your 'Videos' directory, leaving the original untouched. The copied half hour took about ten minutes and 125 MB on my machine.
-If you run into any snags you can't fix with the help files, please feel free to come back and ask for a hand.