installing apk apps using adb failed Read-only file system?

my phone sd card slot is broken.. im trying to install video player apps such mxplayer,gplayer, videoplayer lite ...

so i instlled adb in my computer using adb command

adb install gplayer.apk

but it says:
C:\adb>adb install gplayer.apk
4519 KB/s (13377044 bytes in 2.890s)
pkg: /data/local/tmp/gplayer.apk
Success
rm failed for -f, Read-only file system


but when i look to my phone apps it successfully installed all apps such gplayer,mxplayer,vieoplayer lite...
however when i try to open a video file it always failed to play any video files (mp4,3gp,mp3.etc.) any idea why?

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