Multicam Support

Are there any plans for adding a schemadef for multicam clips, or is the preferred direction to just use a stack to represent multicam clips?

The downside to using a stack is that if you round trip through OTIO back to an NLE you would lose the multicam clips and they would just become nested tracks.

Start by reviewing OpenTimelineIO's existing schemadef and stack representations for how multicam clips could be modeled. Compare the round-trip behavior of a stack with the requested multicam representation in an NLE, then define and document the preferred schema direction.

Written by the indexing model from the issue text.