STEP THREE: VIRTUAL DUB
This is the part of the process that I'm asked about the most when it comes down to having problems. It's a really simple process.
First thing you're going to want to do is click on File, then choose Open. Now you'll want to find the path where you decided to store your .tga files. Once there, you'll notice, depending on how many different clips you recorded, different groups of .tga files. These are categorized by letter.
Example: a_00000 - not quite what it looks like, but the fact is the letter will always come first, and the first .tga will always be all 0's.
You don't have to go about it in alphabetical order if you don't want to, but I don't see why you wouldn't. Find the first .tga for the letter you're on. The first .tga is always all 0's. Since you're going to have a lot of .tga files, I search for the next letter in the file search bar by typing what letter is next, and it will show me the first few .tgas for that letter. It's a lot more handy than scrolling to find them.
Once you have selected the first .tga, it will import the rest of the .tgas for that letter. Now click on Audio and choose Audio From Another File. The .wav files will be in the folder you chose to put the .tga files in. The audio files are also in alphabetical order. Once you've done that, click on Video then choose Frame Rate. Select Change so that video and audio durations match. This will make sure the video and the audio are synced together. In parenthesis, it will show what FPS the video/audio will be at once synced. It's normal if the number shown is a few FPS off.
After this, select File again, then choose Save as AVI. Choose where you want the .avi to be saved, then hit okay.
STEP FOUR: SONY VEGAS
This is the part everyone wishes they can skip to. At least it is for me, as I find recording and stitching together the .tgas to be a huge pain in my ass.
First thing you're going to do is select File then choose New. http://i.imgur.com/yEw7q.png - Here is what you'll want it to look like.
Secondly, you're going to want to do is select Explorer on the middle-left side of SV. http://i.imgur.com/WOlmI.png Then drag and drop the necessary .avi files into the blank rectangular box on the bottom. Once it's placed in there, give it a few seconds to finish its process of loading the audio.
Once you have done everything you wanted to the video, select File and choose Render As. This is where you will choose your render settings. Select Customize Template. http://imgur.com/a/EhGmi - Here is a 3 picture album showing my render settings for Video, Audio and Project. Finally, render.
STEP FIVE: ENCODING
Easiest step. Side note: encoding converts your Sony Vegas rendered .avi into an .mp4 file.
Click select for Video File and find the .avi you made from Sony Vegas. Next, click select for Output File. This is where you want the encoded video will be placed on your computer. I put it on my desktop.
For Video FPS choose 29.97 (or 30 if that's an option for you). For Encoding Preset choose Brassemmense HD 720p (Big). After you have done that, click on Start Encoding.
After the video file has finished encoding, you can now upload it to YouTube.
Congratulations, you're on your way to becoming the best video editor in the world!