Despite the explosion in recent years of video content and even video advertising, there is no easy way to sell a .TV portfolio.
While there are some on the forum who have been invested in .TV since the beginning, selling .TV domains is far more difficult than the argument of .TV being a good fit for a video-oriented site. Yes, there are many Youtube channels titled "Keyword TV" but they often operate without a domain name or operate on a reg fee domain that no domainer would ever register. End users for the most part still do not believe in domains as valuable tools for branding their businesses. I have even seen cases where video channels are using the phrasing "keyword television" or in Spanish "keyword te ve" to avoid having to buy an aftermarket domain.
I still have a portfolio of .TV domains but it is much smaller than five years ago.