Hello there,
I just came back from my vacation and was checking all the footage I have made there.
When watching preview it in my phone my "regular" recorded footage is at normal speed and quickshots are fast.
When I copied the files from my SD card to the computer quckshots goes at normal speed but regulary recorded videos are in slow motion now (like 5x).
Any idea what might be the problem?

You may not be able to do this but can you copy the same files to another computer and if the issue is still there. If it plays normally then its something with your first computer. If it plays like your post above then the files might be corrupt of the SD card is bad.

Hi, the resolution is different then the speed is different, as Hurley mentioned, you can try another computer to check it. If there is any further issue, please feel free to let us know. Thanks.

Well, I tried couple other computers and it is the same. I don't think there is problem in computer, video itself is long.
But I got doubts about my SD card being corrupted, it works perfectly fine with my camera and GoPro. Plus footage recorded by quickshots came out with no problem at normal speed.