[maroon93]

true . if you see old youtube (2005 - 2011) you can see lot of people are using movie maker simply because that is the only available tools and it is easy . no tutorial needed . and since windows 7 they doesnt include movie maker anymore but they offer it as separte download as windows live

and in windows 8 .81 . 10 and newer they offer it as separte download as windows essentials

and movie maker is actually making a comeback with windows 10 fall creator update

im using it too for my youtube' videos i can make simple edit and then upload it

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Yep
but it's little hard to understand/edit
you have to watch some tutorials in order to make good video/trailer

maybe its little bit harder to edit the videos we must learn and learn to boost our experience