We have added two new interview videos to the playlist. You can follow the link above or view them individually here:
Zcoin's ZEth: Implementing Zerocoin on Eth
https://youtu.be/nS1A3VdJFmM
Zcoin's ZEth: Optimizing Zerocoin further for ZEth
https://youtu.be/8eVk7QKxtLg