Irvin
while I tend to agree that the pattern in your new video is good (I do like the idea of leaving the outer mains and bottom and top crosses to the last) so that they dont get in the way. The problem comes with i) tensioning the outer mains thru the already weaved crosses, and ii) leaving out the outer mains until the end.
In i) the tension pulled will not be the same as other mains. If you pull 55lbs on the centre 16 mains, and then you pull 55lbs on the outer 2 when doing last bit, the outer 2 mains won't be 55lbs as they're being pulled thru the rest of the string bed.
In ii), the frame was designed to have all its mains strung (generally) 1st, and that leaving out mains may not be good for the frame especially if stringing high tensions.
I have discussed these point previous with a well-renowned stringer who brought this points to my attention. These are generally the same reason why the "UKRSA" pattern isn't perfect. Both of the patterns discussed help relieve the problem of the hard-weave for the crosses by missing out the bottom cross, but other issues as mentioned arise.
If one were to use this pattern with gut, then the short side end would become very tired, very quickly. Strangely enough, I think using the universal ATW pattern allows the string to work the gut better to protect it. At this point I'd mentioned that both Serena and Venus had their rqts strung in full gut, using the universal ATW pattern at 65 & 68 respectively at Wimby with no issues.
This is also the reason why I didn't add to the other thread where ATW patterns are mention and the suggestions included string the short side main as normal, and subsequently leaving out the opposite main until the end. Again and especially with higher tensions, there'll could be more stress on the frame, and the last weave(s) would be thru the rest of the stringbed. Indeed I use to use this pattern many years ago when stringing PC600. As this is a soft frame, distortion to it would be easy to do if 1 main is missed out.
Regards
Paul