In an old Post No.28 in 2015 I referred to a new documentary being made available for payment. I missed looking at their website till today (due to a post in another, new thread).
Link:http://mysecretwardhofar.blogspot.com/

The website has five short clips and their YouTube arena has more.
Link:https://www.youtube.com/user/OperationOman

Note YouTube has nine hundred hits on Dhofar War!

Finally cross-border raiding is mentioned in part of the website; it involves Nick Downie, who was ex-SAS and on contract to Oman. Here is a quote:
By that time I was a contract officer in SAF, charged with fomenting insurrection among the tribes of S Yemen. I commanded a unit of Yemeni exiles (bedouin) and we lived on the edge of the Empty Quarter. On one raid, we captured a substantial fort, 80 miles across the border. After the garrison surrendered, I filmed a bit of the action, before blowing it up with 1,100 lb of gelignite. This was three times more than was necessary. The fort literally vanished.
Link:http://mysecretwardhofar.blogspot.co...-for-nick.html