So, from the above, to lower the video file size or to change to HD video format
. They are easy to handle. Also you can convert to the same format to lower the size with my recommendation software Video Audio Converter. E.g. I've tried: convert a 2G HD AVI format video to AVI, that the output file is less than 20M so that i can upload it onto YouTube, Just adjust some parameters, lower the Video Size, and it looks as good as many other videos on YouTube. Try yourself to get it! You can find some more details in our website.