I purchased a set of OEM wiper blade refills. However, I had troubles getting the old blades off the housing. I think the wiper blade housing isn't OEM. I removed the housing off my car and took some pictures of it, hoping anybody can shed some light.

 

looks like it is.

FYI, the TRICO Flex beam-style wipers have the same side-loading mount as the factory ones, so they stay low on the window.

 

Are there any good videos or tutorials on how to replace the wiper blades. I'm having troubles pull them out.

 

Should have just bought Bosch Icon's or Trico Onyx IMO. It's a j hook, so it should be pretty simple. The 3rd picture you posted is where the j hook slides in. To remove it there should be a little tab underneath that push/pull while at the same time pulling the wiper the correct way for the hook to slide out...if that makes sense.