There are a lot of online resources for people who want to work on their debate craft, here are a few of the good ones
1. The Atlanta Urban Debate League has posted a set of videos that walks you through everything from cutting a card to watching a practice debate.
2. Michigan debater Callie Chappell has made a series of videos for novices to work on improving.
3. The NDCA has been compiling videos from camp for their open video project which is a good centralized space to find lectures