Thanks for the responses. What level of computing power is needed for smooth 4K playback? Having to downgrade the recording resolution would defeat the purpose of having the capability. Also when you are viewing cool videos on youtube what resolution are you seeing? If not 4K then what is the purpose of having such a nice camera on the craft. Again I am very new to the video aspect here so my questions may seem ignorant because I admit they are.
If you record in 4K you can upload the raw video to YouTube with any machine. When you play it back leave it on auto and YouTube will decide on the best quality your machine and bandwidth can handle. I upload pretty much all my videos to YouTube and leave them unlisted or private. It's an easy way to be able to access them wherever and whenever I want.
If you get a faster machine in the future The 4K file will be there ready to go.