How to ace 428:

First watch this series (1-7) for a basic understanding of the course - 2hrs 30min:
https://www.youtube.com/playlist?list=PLBZBJbE_rGRV8D7XZ08LK6z-4zPoWzu5H

Then watch all 49 of these videos which go more in depth into Data Structures - 9hrs 45min:
https://www.youtube.com/playlist?list=PL2_aWCzGMAwI3W_JlcBbtYTwiQSsOTa6P

Then watch the last two videos of this series for more advanced Time Complexity - 20min:
https://www.youtube.com/playlist?list=PL2_aWCzGMAwI9HK8YPVBjElbLbI3ufctn

Lastly, watch all 8 of these videos for Sorting Algorithms (This is very complicated so take notes) - 1hr 40min:
https://www.youtube.com/playlist?list=PL2_aWCzGMAwKedT2KfDMB9YA5DgASZb3U

Total time is approx. 14hrs 15min