Yes, this was introduced in the latest version for Patch; multi-blends were introduced recently for fillet and blend corners (see this topic).
Why is it not working in your video? Please see the error message in the command history window: it is not possible to mix continuities with multi-blend.
What is possible, is going from this:
Trimmed single surface patch
to this with multi-blend:
Multi-blend - multiple untrimmed surfaces filling the hole