I know a lot of people use Windows Movie Maker or IMovie to make movies for entertainment. Stupid programs (at least windows movie maker) save the file as a unaccepted file in many sites like YouTube. Now, AVS is a good converter. You trolls out there wouldn't say. SUPER is a bad converter. It is too confusing. AVS is specaial because it leaves a "watermark". A very bold "watermark". So bold, the word "watermark" deserves quotes. Anyways, AVS will accept any file i have used. And I've used some pretty exotic files like .nes. Um, i forgot to mention that AVS only leaves a "watermark" with the unregistered version. The difference is...oh, damnit, simple answer is you have to pay for no water mark. This guide will help you with this process. Go along...
Step 1: What You Should Do Before Hand.
After you have made your file in your program, figure out how to add anything you want at the beginning that lasts for 1 minute. I do a little over 1 minute, just to be safe. It can be anything. I do a Chuck Norris approves image, so i can leave it in the file for a couple of seconds.=) Why? Because the watermark only lasts one minute. Afterward, it's watermark free. Get what I'm doing?
Step 2: Converting.
With AVS, you open it up, click "browse" next to the input file name bar, and select your file. On the top bar, select your output file type. I recommend .AVI or MP4. Then click "start". This will take up to a hour. You should just go watch some Mythbusters while you're waiting. =)
Step 3: Bring It Back.
Okay, you just converted your file. It is now a SEPERATE file from your unconverted file. Open it up in your video editing program. This time, ERASE the other thing at the beginning that was one minute long. Save.
Step 4: TA-DA!
Yay! Your file is now accepted by YouTube! Now wait for it to upload.=(