How dangerous Akihabara is!
YouTube - HD 720p walking in tokyo,akihabara 1/2
" walking in Tokyo " is the best series on You tube to feel a atomosphere of Tokyo.Because they are without silly sound effects and weired BGM.
" CRUISE " series is also good one by same person.
YouTube - TOKYO - CRUISE 2009
These footages will help you to decide where to go in Tokyo.