Media Player 12 Library questions

There are a few things that bug me about the new Media Player (which otherwise I think is pretty sweet), and I was wondering if someone has a fix.

The first: does anyone knows how to change the top album cover presented in "artist" view? I don't see any UI element that allows me to do that (which is a shame, I think it would make a nice feature), but I don't mind editing some file to get it the way I want, if only I knew what...

Second: Many people rip their TV serials into formats other than wtv (if I'm not mistaken- Windows' Recorded TV format), and so it will not get inserted into Recorded TV, and yet tags such as "Serial" are not supported in the video library. So far I haven't seen a way to associate more file types to Recorded TV or add more tags to "Video", which will probably involve a hack since it's well integrated into Explorer. Does anybody knows a trick to get videos sorted under the "Serial" tag?

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