All videos used to work but after installing CM7 it just shows blank
not sure if that was directed at me or someone else; in any case, I tried it and it did not help (neither for online nor for local videos).
Google the 10.1 apk. That one should work for online video. Make sure to reboot tue device after installing the apk.
I have a similar - but worse - problem. I cannot watch online videos (e.g. from YouTube), but I can also not watch videos that I have stored locally on the SD card. I both cases I can hear the sound but no video is shown.
Installing Flash 10.1 did neither solve the online video nor the local video problem :-(
Today I was able to fix my problem, which was apparently triggered by the kernel I use - DemonSpeed v9. After getting rid of it and going back to the kernel that comes with CM7, why videos all work now (so does my camera, which also no longer work, recently).
Yea, I believe demonsoeed is for sense only. Try an asop kernel, like one of faux asop kernels.