Unless someone points out to me particular points in that video where there are noticeable differences I cannot see the difference. I'm not trolling or being ignorant but I just can't see. Perhaps my eyes aren't trained to look for the finer detail as long as the whole picture looks good, that's good enough for me.
Its the compression and the size. Youtube videos are completely useless for viewing 1080p.
In the real world you will notice the difference, maybe you wont mind though.