[NeurIPS] Data type extension (Video and multichannel time series )

[pollytur]

It seems like videos are not supported in the Data types (here its only Image object, while in rdflib.namespace.SDO they have VideoObject separately ).

Also, I have a custom data type - technically, it is multidimensional time series (n channels $\times$ timepoints), so rdflib.namespace.SDO.ListItem would probably be the best for it but for now is it fine to use AudioObject for it?

Thanks a lot in advance!

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Related to #371