Reminiscing of past times? Nostalgic melody on Piano

Sometimes I can just think of past times and reminisce. The good ol' days!
Thinking back about good times can be sad cos it's over, weird, right?

Can also be happy, though. Which makes it kinda in between. A bit of happy and a bit of sadness...

So I've named this piece of music: Nostalgia

(youtube is taking a long while to rotate the video 90 degrees, so it might be sideways for now, but should be good in max 30mins... I hope)

Don't ask me for the sheet music!
It's just an improvisation thus I don't have any sheet music

Upvotes are much appreciated!