It being in a virtual machine doesn't necessarily have anything to do with the problems; Audio/video sync in lots of flash content doesn't even work properly outside of virtual machines.
I'd put the odds over 80% that it's just because the VM wasn't fast enough. You then have two options. One is to get a faster machine, the other is to run the VM in slow motion while you save. Obviously the second isn't an option for realtime viewing.
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It being in a virtual machine doesn't necessarily have anything to do with the problems; Audio/video sync in lots of flash content doesn't even work properly outside of virtual machines.
I watched the rest of the video on a normal windows machine, it didn't have any problems.
I'd put the odds over 80% that it's just because the VM wasn't fast enough. You then have two options. One is to get a faster machine, the other is to run the VM in slow motion while you save. Obviously the second isn't an option for realtime viewing.