That’s a good vid, especially because... my vines don’t have that kind of stem damage. Instead, the stems just sort of shrivel up (as opposed to the usual “toughening” but-still-healthy appearance as they mature). The roots though sometimes generate a new stem: My one surviving Japanese cucumber is doing that, and so far the new stem, though not even 2 ft. long / tall, is flowering and attempting to fruit. The other one (Japanese cuke) appears to be dead. I have a few lemon cucumbers in pots and they are liking better this lack of rain almost every day, compared to the prior few very rainy weeks. (The lemon cukes in the ground appear to be all “shot”. They may have just drowned, as opposed to the Opo that is in a well drained pot with new potting soil this late spring.)
FWIW, whatever is happening to the Opo usually happened later in the year in previous years, to Opo, squash, or pumpkins, when soil moisture was modest.
I wish I had a solid/concise answer for ya! I think you need to build a Bio-Dome in your back yard. ;)