Poor Video Streaming.  Any tips?

Hello everyone,
My MacBook Pro really dosn't like treaming video.  Regardless if it's live feeds such as ESPN3 or preset videos from Yahoo/CSPAN etc.  Straeming HD content from sites such as HBO doesn't work too well either.  The only one that works well is Netflix but not always. 
I think I have a fast WiFi connection.  When I do the speed test it's alwasy in the 6-8 Mbps range and sometimes 10Mbps.  I have an Airport Express and for everything else it works well (downloading music, podcast, surfing, updates, etc).  I have the automatic graphic switiching turned off so it's always using the high preformance graphics and my flash player is up-to-date.  
Thank you so much for any help.  I really apprecate it. 
best

Hello mikeswitzer. Welcome to the Apple Discussions!
As you have already figured out poor signal strength equals poor bandwidth performance. This, of course, will be noticeable for both audio and video streaming.
I suggest downloading a copy of iStumbler. Use iStumbler's Inspector feature (select Edit > Inspector from iStumbler's menu) to determine the Signal-to-Noise Ratio (SNR) at different points around your house, by performing a simple RF site survey. Within the Inspector, note the values for "signal" & "noise" at these locations. Start with your MacBook near the Time Capsule (TC), note the readings, and then, go to the location where you currently have the Mac Mini.
SNR is the signal level (in dBm) minus the noise level (in dBm). For example, a signal level of -53dBm measured near an access point and typical noise level of -90dBm yields a SNR of 37dB, a healthy value for wireless LANs.
The SNR, as measured from the MacBook, decreases as the range to the base station increases because of applicable free space loss. Also an increase in RF interference from microwave ovens and cordless phones, which increases the noise level, also decreases SNR.
SNR Guideline
o 40dB+ SNR = Excellent signal
o 25dB to 40dB SNR = Very good signal
o 15dB to 25dB SNR = Low signal
o 10dB to 15dB SNR = Very low signal
o 5dB to 10dB SNR = No signal
If the SNR is 20dB+ at the Mac Mini, then you should be getting reasonable performance from your TC. If less, either try to locate the source of the Wi-Fi interference or try relocating either the TC or the Mac Mini until they are within a 20dB SNR range.
Another option is to utilize a transceiver on the Mac Mini to try to increase the Mini's built-in AirPort antenna ability to pick up the signal from the TC. One vendor that provides these is QuickerTek.

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