If you have an issue with Magpie, or a feature request, you can write me an email at email@example.com. Please check the list of frequently-questioned answers below beforehand, in case your issue has been covered already.
When you first run Magpie, you'll find four videos automatically added to your collection. Saving Videos with Magpie comes in two versions, for each of Mac and iOS. These videos demonstrate how to use the Magpie Action Extension, which is the best and easiest way to get videos into Magpie. If, however, you're in an app that doesn't provide access to the Action menu, there's a couple of alternatives:
There are a variety of reasons that videos may not be directly save-able to Magpie. Here's a list of the most common:
If you want to let me know about a video that you'd like Magpie to support, use the "Notify Developer" link, which will send me an email. I'm using this method to rank the sites that I should target for additional support down the road.
Apple's CloudKit is pretty great, but it doesn't work 100% of the time. If Magpie isn't syncing correctly, the best way to resolve the situation is to quit the app and restart it. On the Mac, it's as simple as hitting Command-Q, and relaunching. On iOS, double-tap the Home button, and swipe Magpie up to force-quit.
Because Magpie relies on iCloud to store your video information, you must be logged into iCloud everywhere you use Magpie. And if you want syncing to work between devices, you must be logged in with the same account. Apple has generously provided lovely instructions for setting up iCloud on your iOS device as well as your Mac.