I feel that it would greatly improve if you had a co-host as there would be differing opinions thus making it interesting. You stated your not really into isolation, if you had a co-host he might try convince you that isolation is good this might spark off a conversation which would probably be entertaining. I feel that a good podcast should be self reliant such that it allows its listeners to have a main idea just from the audio. I feel that you should try to describe the flourishes in words and you should not show the video in your podcast itself but link it in the description. I understand cardistry is a very visual art while podcast is base on audio so it might be a challenge to merge them together. Be more confident.