Well it really depends one what you want to do with your videos. Do you want to showcase your entire flight, or want to make a movie with story and theme? A basic editor will get you where you want to go if you just want to show a whole flight or parts of one. If you want to make a movie with a plot or story, they you need to capture your footage, edit it and trim and edit again and then add sound, etc. Both can use the same tools but one is quite simple one is a bit more complex. What kind of system do you run? Mac or PC? There are a number of free software, like the GoPro Studio, which will edit phantom video, or for a more sophisticated editor look at Davinci Resolve. There are tutorials on the web. Your computer may an app for it already, Like anything in life, there is a learning curve and you can make as sophisticated or simple as you would like.
Alan