With a successful enough exit, you don't particularly need VC money for future businesses. And your business name should have the standard discreet naming system - something generic for putting on resumes, rather than something explicit like "titties-r-us LLC".

Past that, the conversation is about a generic video site, and you can talk about content and bandwidth and getting traffic etc without ever mentioning that it's porn. Don't lie if asked outright, of course, but competent people should be able to read through the lines and notice that you have the good sense to keep the porn involvement discreet.

Like, people don't punish you for being involved in porn unless they're super Puritan. They punish you for not having the good sense to shut up about it and the related risk of you embarrassing them by association. Demonstrate that you can talk about your business activities without being crude and they'll be more willing to play ball.