The Blood is Strong Documentary

[neloon]

it does seem that even Native Scots are sounding less and less 'Scottish' among the younger generations.

I think that's true, Bren, i.e. more "English". This has been going on for a long time, of course, and, in the eighteenth century, books were published on how to rid oneself of Scotticisms and Scottish accents so as to be acceptable in English society. Recent most noticeable changes are the loss of the "ch" so that "Pitlochry" becomes "Pitlockry" and the loss of the "wh" so that "what, where, why, when" become "wat, ware, wy, wen" etc. This is even found with BBC Scotland presenters so it will probably become fixed.
Alan