Hi David,
When you decide on which tutorial video(s) you want to watch, these should ideally be
downloaded to your machine. Your Web Browser should tell you the name of the file that you are downloading and, more importantly, it's file extension - amd it is the file extension that determines how the video was encoded.
When you then want to 'play' the video, you need a player that is capable of 'decoding' the downloaded file.
If you don't therefore have the correct
codec installed in your machine, then you won't be able to play the video in question.
I just checked one of Harry's videos, selected at random, and it had an
.mp4 file extension. From my experience of QuickTime, this application is geared up towards Mac
victims, sorry, users who are going to work with
.mov extensions.
There are, unfortunately a bewildering (and, imho. wholly un-necessary
) number of video and audio codecs available for users to select - and so you cannot blame the person who performed the encoding process. It is when 'locked-up' or 'hooked-in' OS vendors specifically obfuscate the solution process that users, like yourself, are left somewhat 'peeved'.
Perhaps another Mac user has resolved the problem and can help here?