You may find this easier:
http://download.info.apple.com/Apple_Support_Area/Apple_Software_Updates/English-North_American/Macintosh/System/Older_System/System_7.0.x/System_7.0.smi.bin
Apple has a copy of System 7.0 800K disk images on their website. You can download those to your Performa and make actual floppies, the same way you did with System 6.0.8.
As far as the file sharing issue goes, what size hard drive do you have in the Performa? Systems prior to 7.5 have issues connecting to partitions larger than 2 GB even on shared drives. I have the same problem when I try to connect some of my older Macs to a G4. Strangely, I've seen it both work and not work, but I haven't done enough testing to figure out exactly why.
Once you've installed System 7.0, you may have better luck configuring AppleTalk networking so that you can upgrade to 7.0.1.
Also, I can see the video just fine. The only thing different in my setup is QuickTime Pro 7.1.6 and a PowerBook G4.
http://download.info.apple.com/Apple_Support_Area/Apple_Software_Updates/English-North_American/Macintosh/System/Older_System/System_7.0.x/System_7.0.smi.bin
Apple has a copy of System 7.0 800K disk images on their website. You can download those to your Performa and make actual floppies, the same way you did with System 6.0.8.
As far as the file sharing issue goes, what size hard drive do you have in the Performa? Systems prior to 7.5 have issues connecting to partitions larger than 2 GB even on shared drives. I have the same problem when I try to connect some of my older Macs to a G4. Strangely, I've seen it both work and not work, but I haven't done enough testing to figure out exactly why.
Once you've installed System 7.0, you may have better luck configuring AppleTalk networking so that you can upgrade to 7.0.1.
Also, I can see the video just fine. The only thing different in my setup is QuickTime Pro 7.1.6 and a PowerBook G4.