All good stuff from Rotorbee and Shytorque there chr - running out of power doesn't mean stalling the rotor.
On that second video, you can see he nearly overcooks it on his departure - he loses translational lift as he goes through 180 degrees in the transition and is lucky not to hit the buildings.
All manoeuvring in the low speed environment requires extra power above what you need to hover - if you don't appreciate that and anticipate it, you will embarrass yourself.
If you don't have a good power margin above hover OGE then maintaining ETL is essential when manoeuvring spiritedly.
Many pilots will have learned a 'downwind' quickstop where you start downwind at speed, and then use a combination of flare and AoB to end up in the hover into wind. When taught in the military, the idea is to maintain a minimum of 30 kts until within 30 degrees of the wind - this ensures ETL until you are ready for the final decel to the hover.
On SAR we used to teach a similar idea but using yaw to start the turn from a slower speed - 30 to 40 kts - and a fair amount of nose down to maintain the speed and ETL until into wind.. This was a great technique when operating in tight valleys or where you didn't have the room to carry out a normal downwind quickstop.