Can check and delete all the unwanted songs in my itunes library at once? I don't want to do that one by one?

There is nothing wrong with my Internet speed, and it's actually very fast. But when I watch YouTube video, the speed is very slow. I have to wait long for loading.
What can I do to fast the loading and make the playback faster?

Is the trial a full functions or are there limitations or watermarks on the final product?

i downloaded the trial run but its requesting a code to do anything.

I got a new mp3 player recently, which features like camera, video, and music. How can I download videos so I can sync to my mp3 player? Or are there any websites allowing me to download/buy videos sync to my mp3 player? I tried iTunes but it didn't work. Can you help me, please!!!

The above message appears when burning a blu ray.  Program then stops

I have tried to download off Dailymotion and the download options aren't appearing anymore!

I have copied Audio_TS and Video_TS folders to my local drive, how can I burn these folder to another blank DVD disc and make it looks like the same DVD I copied from?

There seems to be some program recording  YouTube video to mp3 or other audio format.
How do I do that free?

I have tried to download off Dailymotion but it isn't coming up with the download options anymore when I put the link in. It still works okay with other video sites just not Dailymotion!