All your problems are due to your source files not being compatible with PE4 (or is that Photoshop Elements 4... PSE4?). Your issue with Virtualdub is that you generated an uncompressed AVI so the file size will be about 1GB per minute. You would need to install a DV-AVI codec to export a compressed video that is compatible with PE4. As you have MPEG_Streamclip use this to convert to DV-AVI. In MPEG_Streamclip you select Export format as AVI, then in the compression select the Apple DV/DVPRO_NTSC codec. And in Field Order check, Lower field first. Also select Uncompressed for your audio format. These DV-AVI clips should work fine with PE4.
You can also use MPEG_Streamclip to download and convert the Youtube videos directly to DV-AVI. MPEG_Streamclip allows you to enter the URL of the video clip (Youtube) and download/convert. Go to File>Open URL. Type in or copy and paste the URL and then in the window select the Convert option and in the next window select the AVI option and use the settings above.
Thanks, I am probably hours and hours of experimentation away from confirming all is well.
How do I "install a DVI-AVI codec" if not included in the codec pack I mentioned? Is there a separate step for VirtualDubMod?
... and yes, I meant PE4. The S must have been a abbreviation for how I was feeling about this problem.
OK, update report. First AVI was handled directly by PE4 -- 640X480, Audio - 128 kbps/LAME MP3, Video - 23 fps, 1453 kbps, 24-bit, XVID. Second AVI, now being transcoded by MPEG Streamclip using the settings recommended (but probably going to turn out to have no video, based on past experience) -- 624X336, Audio - 448 kbps/no codec indicated, Video - 23 fps, 1613 kbps, 12-bit, XVID. The second one, if fed directly to PE4 just locks it up and requires a reboot.
Cant you download the videos from Youtube directly with MPEG_Streamclip into DV-AVI format... this works very well and you should avoid all the conversion issues.
You can download a free DV-AVI codec for VirtualDub but why not use MPEG_Streamclip as it has one anyway. http://www.free-codecs.com/download/Panasonic_DV_Codec.htm
If you cant see the video in MPEG_Streamclip when you import it then it will convert to black video on export. Another converter to try is Super... this tends to work with a wider range of codecs. http://www.erightsoft.com/SUPER.html Note you have to scroll through a few pages to find where the download is.
Also a good utility for determining the codec used for the video and audio of your clips is GSpot: