Hi James.
I'm not sure how long you have been magicianing (

) but in my opinion your concerns are not a big issue.
What you are talking about can be dealt with by pure misdirection. Don't show your hands for so long. If you show them as long as you did in the video, people will become suspicious. If your hands were 'clean' would you show them as much? No.
Think about how you perform a French drop. You don't flourish your hands as much then so don't do it now.
You have magicians guilt and need to deal with what you are doing. Practice how you would perform this if you actually could vanish a coin. A simple open palmed gesture would suffice. Think how much a TT has to be misdirected. The Raven is so much easier.
On a plus note, you nailed the vanish. Get yourself some top shelf patter and you will be away!!
Alec
I may have been born yesterday but I stayed up all night.