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

I know 3gp is accepted on mobile, thus I converted my DVD videos to 3gp format for watching on my mobile. However, both the picture and sound quality are bad and low-quality. Then how do people watch HD videos on their phones? What is the best format for smartphones?

i'm planning to buy Nokia lumia 720.....
I like playing farmville2, cafeland, etc games on fb, so can I play them on my nokia phone??

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

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?

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

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

How to remove drm from kindle version 1.25 or later?

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