Searching for a codec. It's fourcc 'IV50'.

That is the Indeo 5 codec, which has never been ported to OS X. If you can run the Classic environment and have the Classic Quicktime installed you can get the codecs for Classic here: Indeo codecs for Classic
It should go in the Extensions or the Quicktime Estensions folder of the Ckassic System Disk. You may have to restart after installing.

You can find links to the OS9 Indeo codecs on the page that Dick linked to;
http://docs.info.apple.com/article.html?artnum=30506

Look for the OS9 System Folder in the Root level of your Hard Drive.
As per the instructions;
To install Intel Indeo Video 3.2, follow these steps:
1. Drag the file named "Indeo Video 3" to the System Folder on your hard disk.
2. Click OK in the dialog box that appears stating that the driver needs to be stored in the Extensions folder.
3. Restart your computer (restart classic)

Or you can just drag and drop the codec to the Extensions Folder located inside the System folder.

I have the three Codecs installed with QT Pro 6.03 (OS9) and they work fine running from classic, you do not need to boot into OS9 for QT 6.03 to run.

BC? Isn't that in Canada? I live on the Suncoast of Florida. You have a Suncoast in Canada? 😉

Well, the last version of QT for OS9 was 6.0.3. You can only use QT for OS9, in OS9/Classic. A quick search turns up a 6.0.3 updater. You might have to reinstall QT from your system disc, then run the updater. Or you could try searching some more...
QuickTime 6.0.3 Updater

OK I saw your pictures. You need to take the QT Player back out of the QT Extensions folder. It belongs in a folder called QuickTime which is usually in a folder called "Applications (Mac OS 9)". But I guess Classic Apps is close enough....Unless you run the updater, which will create a Folder called Applications (Mac OS 9) with QT inside. ;-(

The following files belong in the Extensions folder;

QuickTime FireWire DV Enabler
QuickTime FireWire DV Support
QuickTime™
QuickTime™ MPEG Extension
QuickTime™ Musical Instruments
QuickTime™ PowerPlug
QuickTime™ VR

These files are in my QuickTime Extensions folder;

3ivx D4 4.5.1 for OS9
KinomaExporter.component
MP3 Exporter
QuickTime Internet Extras
PSI_V.component
QuickTime Authoring
QuickTime Capture
QuickTime Effects
QuickTime Essentials
QuickTime Firewire DV
QuickTime Image
QuickTime Java Extras
QuickTime MPEG4 Authoring
QuickTime MPEG4
QuickTime Music
QuickTime Player Extras
QuickTime QD3D
QuickTime Streaming
QuickTime Streaming Authoring
QuickTime Streaming Broadcast
QuickTime Streaming Extras
QuickTime VR Authoring
QuickTime Web Helper
WMA Audio

And I hope you have QT Pro for OS9. You need QT Pro to convert those Indeos to something OSX can use....
😉

I believe it will work if you can run in the Classic environment. I was a little vague on what you have to do to get it to start playing the IV50 video because I have a dual-boot machine and usually run in "real" OS9.22, not Classic. However, people that do use Classic have verified that it does display Indeo video when the codecs I linked are installed.

Those missing QT extensions are extras that you can live without. I was in a hurry trying to beat the editing deadline. However, the 3ivx codec is probably the best codec to use in OS9, so you might want to install it if you plan on doing any exporting.

I would run the 6.0.3 Updater just in case anything else is missing. And the QuickTime Player is the App you use to open the videos. Run the updater and give it a shot.

At this point, I'm asking myself why you keep moving things to inside the System Folder. The Applications (Mac OS 9) folder belongs at the root level of the HD. That's where it was before you moved it into the System Folder. Inside the Applications (Mac OS9) folder there should be a folder called QuickTime. Inside of the QuickTime folder should be the QuickTime Player which you previously moved into the System Folder, for some reason.

It sounds like someone has been rearranging files on a whim. I would recommend running the QT 6.03 update to insure that all the necessary QT files are present. The Updater is going to expect the QuickTime Player to be in it's default location which is why I described the default location of the QuickTime Player.

Just install the QT Update, if it can't find the files in their default location it will probably just create new ones in their default location. Once that's done just drop the Indeo movie onto the QuickTime Player. You do not need to move anything into the System Folder, except the Three Indeo Codecs you were suppose to install at the beginning of all this....