Re: "Learning Aikido by Watching Aikido Video"
As a supplement to training, yes. As a solo means of learning Aikido from the beginning, no way.
At the karate school where my children and I took lessons we had an instructor who was a third degree blackbelt. She also was the competition team coach. One day I overheard her say she was learning Aikido. I watch as she taught Aikido to the competition team, her movements were very awkward. After class I went into the office to ask about who her Aikido sensei was. Sensei was a VHS machine and a stack of Aikido videos.