Reviewing the Cirrus clip reminded me…
If the battery is THAT dead - then even if you get the engine running - there is a good chance the alternator will not provide a charge. Because it needs a minimum voltage - provided by the battery - to excite the field coils and so provide a charge. And even though it is now spinning like crazy and people think it will now charge the battery - you need a minimum voltage to excite the field coil to get it to charge (yes - I provided the circular reason twice - because many folks don’t understand the point - just because the alternator is spinning - does not mean it will charge).
Which is a real safety of flight issue - because the Glass panel might just flicker to life on the last of the battery. Now as soon as you hit the Transponder or PTT the Radio - you should get a big clue all is not well. But if you got in a state that the battery was that dead - are you paying attention?
And why was the battery that dead? Is it near end of life and not capable of actually providing current when under load? What else might be adrift?
Hand propping an alternator equipped plane comes with a lot more questions than “did I tie it down and set the brakes”.
There was something to be said for generators which will provide some voltage once spinning - regardless of battery condition.
PS - love the videos.