Best ways to join m2ts files from Panasonic Lumix DMC-GH1 and share videos on YouTube?

Panasonic has hit on a good combination that makes us appreciate the original mission of Four Thirds, which was to produce smaller cameras and smaller optics while achieving higher optical quality. The Panasonic DMC GH1 is basically an enhanced version of the innovative Panasonic G1. The big difference is the addition of a High Definition movie mode. The Panasonic GH1 offers a more complete video mode than any digital SLR or digital camera on the market, offering complete control over video exposure, from Program, through Shutter and Aperture priority, to full Manual exposure control. If you have Panasonic Lumix DMC-GH1 and shot some videos with it, you may want to upload the good quality videos on YouTube, Yahoo Video or other web-sharing sites for sharing. Actually, I am attempting to do it like this. But, before doing that, the first I need to do is to convert AVCDH to FLV/F4V, since Panasonic Lumix DMC-GH1 records videos in the format of AVCHD which can not directly upload on YouTube and other sharing-sites. How to make it? Of course, there are many different video converters on the market which can do the conversion job, but I would rather choose the best one which can convert my Panasonic Lumix DMC-GH1 videos without losing quality so that I could share the videos with perfect output quality. Generally, the easiest way to find the best video converter is to try those video converters one by one on the market. It is through this way I have found Aunsoft MTS/M2TS Converter which is powerful to convert Panasonic Lumix DMC-GH1 videos to FLV, F4V, 3GP, MOV, VOB, MPG, MPEG, MP4, MP3, AC3, etc with excellent output quality. In other words, with Aunsoft MTS/M2TS Converter, it is easy to upload Panasonic Lumix DMC-GH1 videos on YouTube for sharing. If there is another alternative tool which can do the job fine, just share with us.