Ipod adult web cams
Use Air Cam to remotely monitor them, while you are in another room.
Why limiting to your pets; do it to your roommates too.
Old USB 1.1 ports-devices will only show "Speed: 12Mb/sec" as thier maximum bandwidth. Modern USB 2.0 high-resolution UVC webcams utterly overwhelm USB 1.1 ports which are more than FOURTY TIMES SLOWER.
Some cams won't display anything - or if they do you'll find your Frame-Rate is so abysmally low you'll just end up in sluggish, slow-motion frustration.
Other reasons: Your computer may not be fast enough. There's a reason why almost all video chat/conferencing programs send smaller frames of video at 1/8 or 1/4 screen size: It's all that current affordble consumer technology and home data bandwidth can handle.
There's an old saying: You can't fit an elephant in your back pocket.
The single best thing you can do that doesn't need any Mac webcam app at all is to improve your room lighting so the camera doesn't have to struggle under inadequate light.
If webcam chat or capture is important to you, spend your money on a new Mac first.
No manufacturer I'm aware of provides an OSX app to support buttons atop a webcam.
(*) The Windows application uses FFmpeg according to the terms of the LGPL v3.0.
You can obtain the source code to FFmpeg from our website at this link, or obtain a copy of FFmpeg source code per instructions here.
Most Quick Time compatible apps allow selecting and switching between multiple video sources on the fly; Nice and Civil to Down 'n' Dirty.