12 bar blues composition 4 bars with jazz chordz

In this video, I was able to play my 4 bars composition with jazz chords.

I thought I played it ok. I think i just need to add more bars to complete my 12 bar blues composition. I think it would sound way better again if i complete everything and use the jazz chords properly so that it won't sound so plain like the previous video that I have mentioned previously.