How does Output Feedback mode use the initialization vector? How can I process Initialization Vector inside the Block Cipher Encryption box (using for example AES) together with the Key? 



Will I encrypt the Initialization Vector like a block of plaintext?
So I can generate a keystream, which I will then XOR  to the plaintext to generate ciphertext?
Will I encrypt the Initialization Vector like a block of plaintext? to generate keystream and I will XOR it to the plaintext to generate ciphertext?


Yes, for the first block of plaintext. For the subsequent blocks, you use the output of the previous encryption (before XOR) as the input to the cipher (along with the same key).