Not sure what you mean with point no1.. can you clarify?
On no2, what resolution did you record in? 1080p or 4k? if its 4k are you sure your laptop is capable of playing the file properly? Also try using a different media player. I use MPD-HC https://mpc-hc.org/ - Its a great playr and FREE.
Remember to buy extra propellers and one or two spare batteries to keep you flying
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