IPhone 6 Plus IOS v8.1 Slow Motion BROKEN

Question

Film in either of the two slow motion speeds and plays back ok on phone.  I put the files in the computer (grab the raw file via explorer), on Win 7 Professional, and played with both windows media player AND Quicktime player (up to date players) and the videos play either no slow motion, plays alternating between fast and slow, one time it played slow but had normal voice pitch, other times played slow with low voice pitch.  On youtube, they don't play in slow motion.  One I shot vertically (which I did just as a test) and it was sideways in the computer, however, youtube rotated it so it's vertical but it is not in HD and it does not play back in slow motion.  This same file that was sideways in my computer stopped playing after about 2 seconds in the computer, but played through ok in the phone.  I noticed that as the video plays in the phone, there are blue vertical lines below the left/right scrub/scroll bar for the video.  This can be set to play only a portion in slow motion.  But WHY does it start each video with the ends nudged in so the first 3 sec is regular speed and the last 2 are also reg speed also w/the slo-mo in between?  It defaults to this each time an you have to spread it out to get all slow motion..
In Win XP, some of the video files don't show up.  It shows .aae files with corresponding numbers to the videos, but most of the videos are not there.
I think this is a huge software bug that needs to be tested.  I updated the os on my new phone before I put anything into my phone.  Everything else has been perfect till this.  HELP!

Answer 1

You said, "...plays back ok on phone."  That's where Apple's software stops.  Your problems with Win 7, Win XP, Quicktime, and YouTube need to be addressed on forums for those programs and/or sites.  Presumably the issue has already been resolved by users on those sites, with different solutions for each.