On average, excluding ones where I do special things, it takes me:
5-10 minutes - Reading my next requested video, finding a good quality version of it on YouTube, skimming it, downloading the video and audio with different sites.
1-3 minutes - Converting the mp4 video file into avi using Any Video Converter.
5-10 minutes - Opening the audio file in Reaper with my "horror version" presets automatically loaded, changing speed for best effect, and playing it back while making adjustments.
10-30 minutes - Opening the avi file in VirtualDub, loading my "horror version" presets, cropping borders out, resizing, changing colors, adjusting gamma settings, brightness, blur effect intensity, and frame rate.
10-20 minutes - Adding the audio file and rendering the video, playing it back, and sometimes making slight adjustments and re-rendering.
5-10 minutes - Uploading to YouTube, adjusting the title, making additions to the default description, and adding tags that are relevant to the video.
All in all, 36 minutes to an hour and 23 minutes.