I dont want the youtube video to buffer/load while i visit to read only comments. is there any way to temporarily stop them from loading/buffering ?
How to stop Youtube Videos from loading?
right click on the video and select 'Stop Download'
^It doesnt appear anymore
ohh...well then just point the cue to the end of the video 
u will have to use some addons/plugins for blocking flash video download...
check in firefox addons section
If you use chrome go to settings -> Advanced Settings -> Plug-ins.
Select Click to play and then Done.
Select Click to play and then Done.
Any specific add-on for Firefox?
I use flash block plugin in firefox.
For opera go to Preferences > Advanced > Content > Enable plug-ins only on demand.
For opera go to Preferences > Advanced > Content > Enable plug-ins only on demand.
Go to Options -> Applications tab -> Select 'always ask' under the action column for every type of media file. this should work.
Also, install Adblock plus to block flash based ads.
ohh...well then just point the cue to the end of the video
When YT removed the "stop download" option from the context menu, it sucked pretty hard.
But your suggestion is good for temporarily stopping the video!
This is what i do....ohh...well then just point the cue to the end of the video
Its easy, simple, requires ONE click and no messing around with addons and settings..even my Grandma can do this (actually she's expired but if she was alive, am she sure could do this)
Dunno why people seek complicated solutions to an easy work-around