Thank you for reaching out.
The one with a black cat is actually already Alfred Premium. If it is not, there would be a banner ad above it.
We have been modifying Alfred's notifications. The free/Premium versions actually get the same notifications. It is simply a difference in design.
The resolution of the thumbnail you see in the notification has been adjusted. It is indeed less sharp than the video itself. However, if you tap on it to play the video, you will see that the video is clearer.
I really hope this helps. Your HD is not gone. If you compare the Events now with the ones from before, the difference should be quite visible.
Hope this helps.