Here are some solo videos for perusal...

 

 

 

And one of my all time favorites, Zyklus by Stockhausen

 

 

 

Check out the middle of the next one for some adaroll technique, one handed marimba roll.

 

 

And why not, one of my favorite pieces, Weiss / Weisslich 31e by Peter Ablinger

 

 

And naturally Tom Johnson's Nine Bells

 

 

As well as the start of Nine Bells