Nokia :: N97 Mini - Videos

I just got a new n97 mini and ive got several things fixed and working up by myself ecept for the videos... for some reason i think my cellphone hates on that because i can't do anything to watch good vids from my computer into my cellphone. I've tried things like connecting to PC in mass storage mode and just copy + paste the file into e: videos but the phone won't recognize them or will attempt to recognize them as music file; then i used the Nokia ovi suite but it lags my comp very bad and always (only) crashes when i go to anything related to videos like going to Photos/videos -> show all and when it goes to certain video the program then crashes or i go to videos and crashes instantly; after that i tried using the Nokia PC suite and I've managed to get videos into the cellphone but ALL of them stop playing the video at certain point, some play the first 10 sec of video and then the video freezes and only sound keeps playing, other play halfway video and then freezes and only sounds continues... i think I've tried as much as i can but videos wont play... what to do with this or something new to do because i prefer watching videos than listening to music