Almost six years on from one of the most ill-fated acquisitions in media history, DirecTV is heading for a new lease of life after AT&T struck an agreement with private equity firm TPG at the tail end of last month. The U-verse and AT&T TV services will also be brought under a new standalone DirecTV organization, in which TPG will hold a 30% stake and AT&T 70%. It means that the main AT&T operation will become a one-man band when it comes to video, selling only HBO Max via its WarnerMedia arm. That means over-the-top video will become AT&T’s primary TV business once DirecTV is cut loose, a significant change of focus for an operator that has consistently kept faith…