Step 0: When you see an mp3 file in Windows, does it say "songname" or "songname.mp3"? If the former, follow this guide to make Windows show you file extensions: http://www.howtohaven.com/system/show-file-extensions-in-windows-explorer.shtml

Step 1: Purchase a totally legitimate copy of Sony Vegas.

Step 2: Get the Twitch VODs somehow. I use http://www.twitchvods.com/download/. The video you get should be an mp4. If it's an flv, PM me on youtube or reddit or something and I'll tell you how to handle that.

Step 3: Vegas freaks out when you give it a 12 hour video, so you may want to break the video into hour-long chunks. I use ffmpeg and a .bat file. Basically, put the long Twitch VOD in a folder, download ffmpeg, find ffmpeg.exe in the "bin" folder of the ffmpeg download, put ffmpeg.exe in the folder with the long VOD, rename the long VOD to "a.mp4" or something, and make a text file.

Put the following text in the text file:

@echo

ffmpeg.exe -i a.mp4 -c:v copy -c:a copy -ss 00:00:00 -to 01:00:00 -o 1.mp4
ffmpeg.exe -i a.mp4 -c:v copy -c:a copy -ss 01:00:00 -to 02:00:00 -o 2.mp4
ffmpeg.exe -i a.mp4 -c:v copy -c:a copy -ss 02:00:00 -to 03:00:00 -o 3.mp4

@pause

Each line starting with "ffmpeg.exe" creates a chunk. There should be as many lines as you need hours. So if the VOD is 11:55:00 long, you need 12 lines starting with ffmpeg.exe so that 12 hour-long videos are created. Note that the output file is renamed in each line (1.mp4, 2.mp4, etc). Rename the text file to "whatever.bat". Double click the .bat file and it should start breaking up the long video into chunks.

Step 4: Now you have chunks of video. Using Vegas is pretty easy, and I'm not an expert in it, so I won't explain too much about it. I'll just say that "s" is the hotkey to split video into two parts, and you'll probably be doing that a lot. I mean, that's basically all I do: I watch the video in Vegas, I hit "s" in two places to isolate a funny part (being careful to not make cuts in the middle of when people are talking), and I move on. Sometimes I do simple things with text, but that's about it. The rest is up to your creativity. If you run into problems, try to google them and you'll probably find an answer. If not, you can PM me.

Before you export video, you should disable resampling. Otherwise you will get a terrible blurry effect. Highlight all the video stuff in your Vegas project. Not the audio, just the video! If you highlight anything other than source video, it won't work. Right click the stuff you highlighted, select the "Switches" menu, and click "Disable Resample."

That's about it. GL.