Just as Vivendi prepares to divest a substantial stake in Universal Music Group with an eye for more independent streaming strategies, UMG itself is turning to video ventures through an extension deal with Lionsgate struck this week. Could the lines between parent and subsidiary soon blur to look more like rivalry, or is mutual back scratching more likely? UMG plans to funnel its extensive access to music rights, from labels including EMI, Virgin Records, Abbey Road Studios, Capitol Music Group, Def Jam Recordings and Republic Records, to name just a few, towards original TV projects with Lionsgate. Specifically, the deal entails the world’s largest collection of recorded music collaborating with Polygram Entertainment, Lionsgate’s film and TV production and development arm,…