Feature Request - Batch Delete

In Submit - Teachers need the ability to batch delete videos 

This solves the problem of deleting videos quickly.

This happens every day when I listen to new student submissions. It is very time consuming to delete each one individually. 

My current work around is to delete each one individually and it takes too long. 

My ideal solution would be to have check boxes next to each submission and a drop down menu to "select all". They another option to delete selected. One quick move instead of multiple (today I hand deleted 25 videos) This would ut my clicks down to 2-3 instead of 50.