Thanks for uploading it, I have checked and realised that
majority is 0x0000009C: MACHINE_CHECK_EXCEPTION. Which put it in a
simple form is more or less an hardware error.
So recently have you update any of your hardwares like graphics
card, sound card etc... Did you just bought your computer and if
you bought it for quite awhile and this problem only happens now?
Also have you tried viewing the same video in fullscreen in other
browsers beside Safari.
Another thing is to do a memtest, which is to check your RAM for
errors. To install memtest go here & than prepare a blank CD and a burning
software (e.g. Nero). Once you have downloaded the above file open
and extract the content inside which you will see
"memtest86+-2.11.iso". Open your burning software and simply points
it to the iso and let it burn. Restart your computer and put the
disc inside when it first start (BIOS screen) than press any key to
boot the disk. Than you will see a blue colour screen than just let
it do the test for at least 10 tries. Watch the error column to see
if it has any number other than 0. If there is, it is most probably
your RAM has problem but before you disposed off, it is wiser to go
to your manufaturer and let them test it out.
To burn from Nero: Nero>Disk Image or Saved
Project>[select the memtest iso file]Ok>Next