Blinking and pulsating stars are not supernova, that would be all over the news! It's common for a very bright star (Sirius) or a planet (Venus,
Jupiter) to appear like its pulsating due to atmospheric disturbances, especially when it's not in the zenith (90° above your head) but located more
to the horizon, like you can see in your video compared to the streetlantern. The light of the star has to travel through much more atmospheric layers
from a wider angle when it appears above the horizon, and as such ancounters more disturbances whichwill divert the light which gives it a blinking or
birght/less bright effect. The same with the colors.
Taken from a nightsky guide of March the 22nd 2007 directly:
"Venus remains bright in the western sky after sunset. It shines at magnitude -3.8."
stargazing.suite101.com...
So what you saw should have been Venus, right? Or Jupiter with a magnitude of -2, Saturn or maybe Regulus (bightest star of the Lion). I see all the
times blinking stars standing out of the other stars but these are not ufo's, just planets and very bright stars (Sirius, Regulus, Arcturus, Vega,
Deneb etcetera)