Howdy,
Looks like a nice clean setup.
I'm not an expert, but I've built up a number of 24v (8s) systems, using the same Battery Hookup packs, and I'm very happy with them.
I watched most of each of your two videos, but the one phrase that I did not hear was 'top balance'.
All of my packs run with a maximum deviation of .020 to .035 volts (20 to 35mv) and the standard balancing from the BMS has kept them in this range for the past 50 to 60 charge/discharge cycles.
Although I do not have a Daly BMS, most BMS's will only enable the balancing circuit when
a. the pack is charging
b. between preset voltages, normally 3.45 volts and 3.65 volts (at the cell)
During this period the balancing current is in the .030 amp (30 ma) range.
Depending on your charging rate, you may see that you will be in this range for maybe an hour or so for each charge cycle.
So, for two hours of charge time, you may shave .060 amps (60 ma) from your run away cell.
If your runaway pack is 4 or 5 amps off (4000 to 5000ma) it may take a long time for it to get in range with the other packs.
Hope that helps and good luck with your system.
I really like my packs and hope they may last the couple thousand charge cycles, that they claim...
DennisB