Media Player (new app)

It's a pretty bad user experience. At least with Groove, when I double clicked a video I imported from my phone it'd near instant launch it. I just tested it on a video I imported from my phone(Blink security cam footage, mp4, 1.2MB). Instantly came up with the grey screen with the logo in the middle, then after 3 seconds, the logo went away and started getting that dancing dots line "working" indicator. After 22 additional seconds, it started playing the video. Closing down and double clicking the video again, it came up within 6 seconds and played. Right clicking in file explorer, going to open with, and selecting windows media player was less than 2 seconds to start playing for those "there's something wrong with your computer" folks. This is highly repeatable. Any video I haven't opened in the new media player app gives this same 20+ second delay before first playback and future "quick"(er) playback. It's a symptom of authors of these apps either having state of the art development machines or not dog fooding their own apps.