I have source data like JSON but I have property in significant very long JSON value. Could you suggest how to deal with this situation? and give solution how to handle very long JSON value?
Moreover, I followed in https://www.youtube.com/watch?v=4tDyfAaIqEw but not solve my problem.

2) What index I should use for example, VectorStoreIndex,TreeIndex, GPTKeywordTableIndex.

If I want read file .csv what is the best reader for it?