Does everybody know how to upload HD videos to YouTube in original .m2ts format?

I just now figured out how to upload videos taken on my Panasonic TM900 to YouTube in their original HD .m2ts format and quality. I am able to do this using Internet Explorer. I am also able to edit and combine individual video segments and still keep them in their pristine original quality using Panasonic's HD Writer software before posting to YouTube. I was just wondering if everybody knows that is possible. The reason I am starting this thread is that I tried so hard when I first got the camcorder to post in original format using Mozilla Firefox and simply couldn't ever do it, so I was really surprised to find out I could do it using Internet Explorer which I generally don't like nearly as much. The quality of the videos in their original format is much higher than that of the ones I converted using iSkysoft Video Converter even though I was supposedly converting them to another HD format (.wmv HD) and the file sizes didn't shrink. Am really curious whether it is/was common knowledge that there is no need to convert Panasonic HD video into any "YouTube approved" format before uploading them.

Does YouTube convert things to 30p or 30fps or is that the same thing? And, I'm sure this is a totally newbie question, but what does "resample" mean in the context of videos, and does that mean that a 60p video will end up looking better on YouTube than a 60i video? Also, I still don't understand how I can upload in original format through Explorer but can't through Firefox? I'm just really curious about why that is. I'm also still really curious as to why I can't upload anything using the "online sharing" function in HD Writer, but instead have to pick up the video from its hard drive location and "open" it from there to upload it. Again, I just don't understand why I can't get the "online sharing" function to work, and wonder if anyone has gotten it to work.

The fact that that function did not work is one of the biggest reasons I thought I needed to get a video converter in the first place, which makes me wonder if a lot of people could be saving money and uploading higher quality videos by not buying video converters if they only knew how to do what I just figured out. This makes me think back to when I first got the TM900 and was emailing people who said they had posted in original format and never did get a straight answer from anyone as to exactly "how" they managed to do it. So, do you use the method I'm describing or are there other ways to accomplish the same thing? I'm seriously thinking about posting my own video about my process because there does not seem to be anywhere a detailed step-by-step explanation of exactly "how" people are uploading in .m2ts or .mts formats.