What could I do to improve my youtube video?

Ok so I made a YouTube video of my 2 JL w6's but I'm wanting some advice on how I can make it louder. Please don't dislike my video as I'm trying to get more views on it and get it higher on the search bar. And note that this video is only on 27 volume...

The video is : http://www.youtube.com/watch?v=uWk0ojHRT… It contains special effect material, for e.g me having explosives in my hands and so on and could you tell me what i could improve.. and if you surly wont mind could you add in a few comments...

With some Youtube videos I watch, like a music video or something, the sound is great. It sounds just like how it would if I were listening to an iPod or radio. Now, how does one go about making the sound so good? Is it just the camera they're using...

I have started to make youtube videos and i dont know how i can improve them. https://www.youtube.com/watch?v=mQyLrkIVJ4c

Here is my new channel vid, can you watch and give tips on how to improve. I will also sub for a sub if anyone wants an extra sub? http://www.youtube.com/watch?v=qYqrHpJlvmw&feature=channel_video_title

Here is my new channel vid, can you watch and give tips on how to improve. I will also sub for a sub if anyone wants an extra sub? http://www.youtube.com/watch?v=qYqrHpJlvmw&feature=channel_video_title

I have a video thats three years old with a lot of views and its only 240p. I want to know how to improve the quality so its more enjoyable to watch.

I want to see someone's youtube video clearer. Its the only one. I saved it on my computer but i'm wondering if i can make the image quality better because it is so blurry.