Videos:

2016 Indoor Drumline Highlights

2016 Renegade Regiment Percussion Section

Links: 
Metronome (use this online metronome to practice from your computer) 

Percussive Arts Society

Innovative Percussion

Vic Firth

Sabian Cymbals

Remo Drumheads

Music For All

Drum Corps International

Winter Guard International

TCU Percussion Videos

OU Percussion Videos