You need to have price sensitive information that is not in the public domain. Owning a competitor company doesn't seem to fit the bill.
Do you have insider info about Netflix? It doesn't sound like it based on your question. So the answer is yes.
It's like asking whether shareholders of Coke can short Pepsi stock.
Of course. Not a million miles close to insider trading.
Say netflix for example, a public company, has stock price xyz. Say I have a brand new company that's similar to netflix except it charges less and has more movies etc. Am I allowed to short (bet against) the price of xyz?