The YouTube video discusses how filecoin actors work and how they can be used to improve the reliability of blockchain shards. It also talks about how the Filecoin network has a new functionality--verifiable storage--embedded into the model. This could lead to interesting things, such as a data dial which manages the preservation of data inside of Filecoin sectors. Additionally, the video mentions how user actors always kick off the interaction with system actors, because the system actor needs to not know or care about them. Finally, the video mentions how refactoring the system actors could make it easier for user actors to call into them and get the right functionalities.