my macbook is having trouble playing youtube videos

I would really like to watch youtube videos in HD but when i try to play it constantly buffers. Also, youtube will always put quality on automatic everytime. I've tried everything basically, reseting safari, clearing catche, clearing history, and even deleted adobe flash player and reinstalling it but nothing changes. I can play videos fine on my iPhone but not my macbook. What could be the root to the problem? I did a EtreCheck report for more information and I got these results. Could someone use this to help me resolve my problem?

EtreCheck version: 1.9.11 (43) - report generated May 25, 2014 at 10:45:29 PM EDT

Hardware Information:

MacBook Pro (13-inch, Late 2011)

MacBook Pro - model: MacBookPro8,1

1 2.4 GHz Intel Core i5 CPU: 2 cores

4 GB RAM

Video Information:

Intel HD Graphics 3000 - VRAM: 384 MB

System Software:

OS X 10.9.3 (13D65) - Uptime: 0 days 6:34:27

Disk Information:

Hitachi HTS545032B9A302 disk0 : (320.07 GB)

EFI (disk0s1) <not mounted>: 209.7 MB

Macintosh HD (disk0s2) / [Startup]: 279.21 GB (172.48 GB free)

Recovery HD (disk0s3) <not mounted>: 650 MB

BOOTCAMP (disk0s4) /Volumes/BOOTCAMP: 40 GB (20.95 GB free)

MATSHITADVD-R UJ-8A8

USB Information:

Apple Inc. BRCM2070 Hub

Apple Inc. Bluetooth USB Host Controller

Apple Inc. Apple Internal Keyboard / Trackpad

Apple Inc. FaceTime HD Camera (Built-in)

Apple Computer, Inc. IR Receiver

Thunderbolt Information:

Apple Inc. thunderbolt_bus

Gatekeeper:

Anywhere

Kernel Extensions:

[kext loaded] com.Cycling74.driver.Soundflower (1.6.6 - SDK 10.6) Support

[not loaded] com.ZyDAS.driver.ZD1211RevB (4.5.7d0) Support

[not loaded] com.ZyDAS.driver.ZD1211USB (4.5.7d0) Support

[kext loaded] com.digidesign.iokit.DigiDal (11.0.1f4 - SDK 10.7) Support

[kext loaded] com.manycamllc.driver.ManyCamDriver (0.0.9 - SDK 10.5) Support

[not loaded] com.paceap.kext.pacesupport.leopard (5.9.1 - SDK 10.4) Support

[not loaded] com.paceap.kext.pacesupport.master (5.9.1 - SDK 10.6) Support

[not loaded] com.paceap.kext.pacesupport.panther (5.9.1 - SDK 10.3) Support

[kext loaded] com.paceap.kext.pacesupport.snowleopard (5.9.1 - SDK 10.6) Support

[not loaded] com.paceap.kext.pacesupport.tiger (5.9.1 - SDK 10.4) Support

[not loaded] com.wibu.codemeter.CmUSBMassStorage (1.0.7) Support

[kext loaded] org.virtualbox.kext.VBoxDrv (4.2.18) Support

[not loaded] org.virtualbox.kext.VBoxNetAdp (4.2.18) Support

[not loaded] org.virtualbox.kext.VBoxNetFlt (4.2.18) Support

[kext loaded] org.virtualbox.kext.VBoxUSB (4.2.18) Support

Startup Items:

VirtualBox: Path: /Library/StartupItems/VirtualBox

Launch Daemons:

[loaded] com.adobe.fpsaud.plist Support

[loaded] com.avid.bsd.DigiShoeTool.plist Support

[loaded] com.google.keystone.daemon.plist Support

[loaded] com.microsoft.office.licensing.helper.plist Support

[loaded] com.oracle.java.Helper-Tool.plist Support

[running] com.paceap.eden.licensed.plist Support

[loaded] net.sourceforge.MonolingualHelper.plist Support

[loaded] PACESupport.plist Support

Launch Agents:

[loaded] com.google.keystone.agent.plist Support

[loaded] com.oracle.java.Java-Updater.plist Support

User Launch Agents:

[failed] com.adobe.ARM.[...].plist Support

[loaded] com.BlueStacks.AppPlayer.LogRotator.plist Support

[loaded] com.BlueStacks.AppPlayer.Service.plist Support

[loaded] com.BlueStacks.AppPlayer.UninstallAgent.plist Support

[loaded] com.BlueStacks.AppPlayer.UpdaterAgent.plist Support

[not loaded] org.virtualbox.vboxwebsrv.plist Support

User Login Items:

uHD-Agent

CrossOver CD Helper

Infovox iVox Updates Checker

Google Chrome

Internet Plug-ins:

LogitechDeviceDetection: Version: 1.0.0.76 - SDK 10.7 Support

FlashPlayer-10.6: Version: 13.0.0.214 - SDK 10.6 Support

Flip4Mac WMV Plugin: Version: 3.2.0.16 - SDK 10.8 Support

Flash Player: Version: 13.0.0.214 - SDK 10.6 Support

Default Browser: Version: 537 - SDK 10.9

QuickTime Plugin: Version: 7.7.3

SharePointBrowserPlugin: Version: 14.4.1 - SDK 10.6 Support

Silverlight: Version: 5.1.10411.0 - SDK 10.6 Support

DirectorShockwave: Version: 11.6.5r635 Support

JavaAppletPlugin: Version: Java 7 Update 55 Check version

Safari Extensions:

AdBlock: Version: 2.6.34

Audio Plug-ins:

BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9

AirPlay: Version: 2.0 - SDK 10.9

AppleAVBAudio: Version: 203.2 - SDK 10.9

iSightAudio: Version: 7.7.3 - SDK 10.9

iTunes Plug-ins:

Quartz Composer Visualizer: Version: 1.4 - SDK 10.9

User Internet Plug-ins:

BlueStacks Install Detector: Version: 0.3.6 - SDK 10.7 Support

Picasa: Version: 1.0 Support

Google Earth Web Plug-in: Version: 6.2 Support

3rd Party Preference Panes:

Flash Player Support

Flip4Mac WMV Support

Java Support

Time Machine:

Time Machine not configured!

Top Processes by CPU:

7% PluginProcess

6% Safari

6% WindowServer

3% com.apple.WebKit.Networking

3% hidd

Top Processes by Memory:

184 MB Safari

131 MB com.apple.WebKit.WebContent

123 MB PluginProcess

102 MB com.apple.IconServicesAgent

86 MB mds

Virtual Memory Information:

744 MB Free RAM

1.57 GB Active RAM

671 MB Inactive RAM

1.02 GB Wired RAM

751 MB Page-ins

7 MB Page-outs