Let me point out a few reasons why you should have not bothered posting at all:
1) He did not ask for your opinion.
2) Your opinion doesn't matter.
3) It also doesn't matter if you were amazed by the video or not; sharing the effect is the purpose of this post.
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It's a very good effect; thanks for posting this!
Now let me point out a few reasons why you should have not bothered posting at all:
1) It's an open discussion forum about magic. You can post whatever you like as long as it is within the rules and is on topic.
2) The OP posted the link so he/she could:
a. share the magic
b. listen to what you have to say about it
3) If he/she didn't want your opinion about the content, he/she would have stated so. i.e. He/she didn't ask you not to post your opinion.
4) EVERYONE's opinion matters.
5) After ranting about why the poster above should not have posted his/her opinion, you went ahead and added your own opinion... What I could say to you about that would break the rules of this forum so I'll just keep my mouth shut for this bit...
Actually, I'll make it less profane and say:
"What the hell is wrong with you?"