Video Playback Skipping After Updating Memory Storage

I am currently using a Macbook from 2006, originally running on OS X Tiger but upgraded to OS X Snow Leopard back in 2009. That switch worked fine, no problems. Recently, in an attempt to make my macbook faster, I upgraded the Memory storage. This is my systems original hardware specs:
Model Name: MacBook
Model Identifier: MacBook1,1
Processor Name: Intel Core Duo
Processor Speed: 2 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 2 MB
Memory: 1 GB
Bus Speed: 667 MHz
Boot ROM Version: MB11.0061.B03
SMC Version (system): 1.4f12
I upgraded the Memory from 1 GB to 2 GB as was recommended by Crucial.com. Since the upgrade, any time I watch videos on my computer, the video freezes, skips and/or the audio cuts in and out. I've since switched my Memory back to 1GB and still encounter the same issues. Aside from stating the obvious -- yes I know it's an old computer and I'm due for a computer upgrade in general -- is there a way to improve this video playback issue? Or is the other hardware in my Macbook so dated that the Memory upgrade is too powerful for my computer to maintain? Any serious feedback is much appreciated.

The memory upgrade isn't too powerful, and Snow Leopard should run ok in 2gb of ram. Video takes a lot of resources, try to not have anything else running when you watch video and see if that helps. Are you trying to watch online videos or are these videos stored on your hard drive or a DVD? You might try running Activity Monitor to see if something is running in the background using up valuable resources
Using Activity Monitor to read System Memory and determine how much RAM is being used (OS X Mountain Lion and earlier)
MAkesure that both sticks of memory are being recognized and also make sure that your hard drive isn't getting too full.

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General
Complete name : /Users/tester/Movies/export-tests/test24trailer.mpg
Format : MPEG-PS
File size : 12.9 MiB
Duration : 12s 576ms
Overall bit rate mode : Variable
Overall bit rate : 8 614 Kbps
Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@High
Format settings, BVOP : Yes
Format settings, Matrix : Default
Format settings, GOP : Variable
Duration : 12s 533ms
Bit rate mode : Variable
Bit rate : 7 995 Kbps
Maximum bit rate : 38.8 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Active Format Description : Letterbox 16:9 image
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ID : 189 (0xBD)-128 (0x80)
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Format/Info : Audio Coding 3
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COME ON APPLE....READ THESE THREADS AND FIX
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Video Playback Skipping After Updating Memory Storage

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