The Series Seed is a set of investment documents for equity investment startup funding, as opposed to convertible security funding (such as a convertible note or a SAFE). Series Seed terms discussed in this video include:
Pre money value
Preferred stock voting rights
Drag along rights
Investor rights agreement
Management rights letter
Some angel investors preferred an equity investment over a convertible security because the equity investment makes it very clear what percent ownership the investors will receive.
You can read more about the Series Seed and download the documents at: