no offence' but this question is kinda stupid... any editing sortware owuld work well for edit ski movies and the way you asked id say windows movie maker assuming your on a pc. on a mac assuming you dont know anything about editing youd go for imovie. both are free. also for higher end editing on mac ther is only final cut pro witch i use and alot of ski movies are presently made on and also a few cinema films and on pcq for better quality there is adobe permiere elements,more professional version of premiere... adobe premiere pro, there is also avid but im guessing youll never use it and its really complicated for a begginer and there is sony vegas.
if your on pc and your new but adobe premiere elements or vegas movie studio platimmu or whatever the name is. on a mac go for final cut express but this s still a hard one. anyways if you have any questions send me a private message.