I usually use iDVD to burn dvd format pictures, movies, and data, but in my new Mac computer there is no iDVD, where can I get that (useful for me) program?

I'm trying the trial version to see if this is the right program for my needs. I need a blue ray with menu creator. My question is, after I created my menu and burned sample videos on a blue ray disk, why doesnt that custom menu show up? When playing back all I get is black screen with play movie and chapters. All the menu and title bars are gone.

I checked out a CD from the public library and listened to it on my computer. Then I dragged two songs into my iTunes library. Is this illegal, since that's loaned stuff?

It's said dslr camra video is too large although it is not taken in 480p.
I recorded a 2-minute video clip, the size was about 100 mb. why?

I've downloaded some videos in mpeg format, can I watch them on iPad?

I have been using iTunes TuneUp. It stopped working yesterday when I updated iTunes to 12.0.1.26, though I have faith they will fix this. However I have 95,000 songs after removing duplicates and am half way through cleaning them. I would like to continue as soon as possible. I have also upgraded to Yosemite. So, does this product work with all the latest software?

I have been trying to get this video done I made but the files are so big and HQ that they lag my software!
They are MP4 and they are HUGE. I have been trying to get them done for the past 2 days but haven't been able to because of the slowness it causes. So I want to downgrade the size so it will help me to create the videos easily.
I am currently using Freemake Video Converter, but that sodding bastard took 6 HOURS to convert in WMV!!!!
So I don't want to go through that again... What is the fastest and best converter? And what format should I convert from MP4

just purchased a movie,  i can't play it on my iMovie.
iTunes said the media is protected by DRM.
How can i do?