I got a go pro hero 4 silver edition, not long ago. I filmed in 1080p 60fps. I put the clips together in iMovie and was planning on uploading it to youtube. I did that, and when I watched the movie myself. My quality decreased immensely! Even when it said is was 1080p HD, the quality was horrible! I then tried to put the video into Gopro studios and remade the whole film. I uploaded to youtube and the same thing happened. I don't know how to fix it!
Here is the link to the video so you can see how bad the quality is compared to what it is supposed to be:
Read more: NEED GOPRO EXPERT! QUALITY LOSS WHEN UPLOADING TO YOUTUBE?!