Why would you flick a lead rope at him while he is loose when you know he has had a bad experience with people hitting him with whips in the paddock? That does not make sense at all to me, either you were doing it for the reaction he gave so you could video tape it or you truly thought this was a friendly gesture. I don't know which is worse.
Your body language around this horse speaks volumes, you appear terrified of him. This is not the way to be around a horse that is slightly dominant anyway as the behaviour will only worsen. When you approach with a saddle blanket, do so quietly, confidently and try not to wave it at him. It should be folded and held at your side so he can see it but not be startled by it when it flaps in the wind. If you truly are this frightened of him it sounds like you could benefit from having someone else work him through these issues.