I probably don't clearly understand the question. Dr. Dolittle (if you reference the commercially produced motion picture) is copy protected material that belongs to the owners of the film rights.

The movie DVD - like most commercial movies - has a simple encryption built in to prevent people from making illegal copies.

You can do a Google search and probably still find free downloads of a utility called DVDShrink that will remove the encryption and compress the program so it will fit on a single layer DVD disc. I believe that DVDShrink was written to work with the Nero burn "engine" so you may need Nero - I think you can download a trial version of Nero at their website.

Once a movie has been de-crypted and "shrunk" then the .vob dvd type files can be opened by some video editing software and, at that point, you could edit the clips you want together and the apply the music in the audio track.

You could use clips of your own home movies or Dr. Dolittle and add jpeg stills with effects and transitions and scrolling titles.

The you would probably need to render your program to a size that YouTube will accept which I believe is less than 100meg. Five minutes in VCD format resolution will be less than the 100meg limit.

Remember that while the above is simple to do the MPAA takes use of their content seriously - making copies of commercial movies is a federal offense. Okay, okay - there appear to be a bunch of people posting copy protected stuff online.

Remember that same applies to recorded music unless you created and own the music and the performance.

So far as editing software goes I have Adobe Premiere and my opinion is Adobe products are difficult to use unless so unless you need professional level capability there is plenty of inexpensive and easy to use software on the market.

I have fun with a program from ULead called Video Studio. Latest version available for under $100 and a nice Special Edition version is bundled free with a number of computer DVD drives/burners.

I have used one of the "free" versions of ULead for everything from editing home movies to editing a concert shot with six cameras and separate digital soundtrack so these little programs are easy to learn and pretty feature rich.
GoodLuck