When the file cannot be converted or too small size, it means the file is in the wrong format...
Ensure the file format is correct before uploading to youtube...
Using windows movie maker -- you have to save it into the proper file format, that is "wmv" file (use the "save movie file" on the menu at the top left) before upload..
The WMV file will be smaller in size but still quite good quality.. so uploading it will be faster.
also some movie maker version requires to be published instead of save... for that, press "ctrl-p" to publish or search&select a publish option from the menu at the top of the program window.
--for best editing....
use windows movie maker (included in your windows machine)... it can help you make beautiful slideshow or video clip(e.g. mixing your songs with pictures/video/etc).... then save it as video file such as wmv file format... finally upload.
or .. Just get those clips you want , save & convert them, and then mix/match with pix/sound/etc using windows movie maker to create new masterpieces....
this will help you.... Use 'zillatube'. This is the easiest (and also the fastest) way.
Zillatube produces mpg/mp3 formats from youtube that are compatible with windows movie maker(or media player), and more.
It is very easy to download and convert videos. Then edit those converted mp3/mpg videos with windows movie maker... save your file as wmv and then upload.
It works very well....just google search for "zillatube"
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