hi, i am having some problems which would like that anyone to help me with:

1)internal error and web browser shut down maily when playing video.
2)mobile suddenly stops wifi signal while wifi sign is on and router is woking fine and when try to open any site it says page cant be displayed cause am offline and to solve it have to restart wifi and sometimes phone.
3)operation failed while taking video and when i open media player says i have no media file and have to wait certain min till it refresh and restarting phone doesnt solve it.
4)it takes few seconds to open bookmark on desktop even though am overclocking min 500 and max 850.
5)while playing video after recording it there is sound like poping is this normal?
6)same problem of unnown formate while playing video that i recorded from mobile itself or downloaded it and played it many times before.

am new so please post simple solutions thank you