Q: Where is QuickTime X? (I only have QuickTime 7 Player)

From talking to Apple, the issue is that for QuickTime Player the "Pro" functions have not been made compatible with OS X 10.11 "El Capitan", and the QuickTime team has not decided yet when they will release a compatible version.  So it's either purchase notably more expensive apps such as Final Cut, or downgrade to earlier versions of OS X, or use a third-party app, or just be SOL.  I'll probably try to find a decent 3rd party video editor that isn't an investment - Any recommendations?

Strange, both QT X (v10.4) and QT 7 Pro (v7.6.6) system embedded structure still work fine for me under El Capitan. The main difference between the two is that the older QT 7 Pro player trim routines are "frame accurate" whereas the newer QT X routines are not. As to purchasing a "Pro" key or buying FCP, why bother? Since the QT 7 structures still work, it would be easier/cheaper to download the free MPEG Streamclip player/editor and use it for making "frame accurate" trims the same as if you were using a "Pro" keyed version of the QT 7 player. (I.e., MPEG Streamclip accesses most of the same routines—other than track, layer, and mask compositing) used by QT 7 Pro but without requiring a key to unlock the edit/export features.)

It still seems that the new version of Quicktime does not have the editing functions that Quicktime 7 pro had. I had Pro at one time and after a period of time I was requested to pay again - I didn't - why pay twice - but now I want those functions and when trying to buy the pro upgrade I get sent to a general info page with no option to purchase the Pro version - come on Apple!

It still seems that the new version of Quicktime does not have the editing functions that Quicktime 7 pro had. I had Pro at one time and after a period of time I was requested to pay again - I didn't - why pay twice - but now I want those functions and when trying to buy the pro upgrade I get sent to a general info page with no option to purchase the Pro version - come on Apple!

I doubt the QT X player editing features will ever support the masking and/or compositing multitrack/layer features of QT 7 Pro. If your copy of QT 7 Pro is requesting you repurchase a registration key, then your app has somehow become  "deregistered" and you should simply re-enter the registration key and name under which you originally purchased the key from Apple. As to Apple's removal of the option to purchase a QT 7 Pro registration key, I suspect this is an effort by Apple to pre-position itself for the final demise of the QT 7 Player GUI and removal of the current "classic" QT 7 structure embed from the MacOS operating system sometime in the "relatively near" OS upgrade future. When QT X was originally released pundits estimated the replacement of QT 7 by QT X would take roughly a decade. We are now 7 and one half years into that prediction. Based on previous "pre-positioning" actions by Apple in relation to software upgrade releases, I'd estimate QT 7 will likely "be history" in one of the next 2 major MacOS releases.