I don't see a problem with it, as long as you're up front with your members. If they don't want it to be re-sold, or if they request something that may impact resale (e.g. - moaning a name), then increase the price of the custom to compensate.
I agree with this. I use forms for all of my services: worn items, custom videos, private shows, etc. They outline everything from rules to payment options. I always note in said forms that custom videos are my property and cannot be disseminated, shared, and/or sold in any capacity without my written permission. This also makes it implicit that I
can do whatever I want with said videos.
That said, it's important to maintain at least
some semblance of civility as a model! It's polite to give the customer a heads up, but not wholly necessary. Personally, I don't email them and say, "Hey, I'm posting your custom video on c4s or ManyVids!" That most likely will lead to more trouble than it is worth. What IS necessary in my opinion is ensuring that:
1) the original client's name/personal info is not present in the video (if it is, edit it out. if you cannot edit it out, don't use it)
2) nothing in the video or description(s) thereof indicate
who commissioned the video
3) you wait for a certain amount of time (up to your discretion, but I say at least one month) before posting it on a clips site - it can be very offensive to a client to see a video they paid, say, $100 for pop up on a clips site for $10 just a few days later
Keep these things in mind and I believe you are being civil about it. At the end of the day, though, the video is YOUR property. Just keep in mind that
not observing the few considerations I enumerated can be considered unprofessional and upset a client