https://www.youtube.com/watch?v=hnNIKF450rU

4k download is very so useful that I registered as paid user.
BTW, the clip on the link( https://www.youtube.com/watch?v=hnNIKF450rU ) is not downloaded fully.

the original clip's length on youtube is 9 min,
but downloaded file using 4k is only 5:20 length and after that point, the image is black out and only sound is played.

I have tried several times to download but every time it has same result.
and i have tried another site that support youtube download, same result as well.

original clip on youtube seems normal, it is played without problem, but downloaded file has something.

please check this out.

Thanks