PSA: You can view the skill videos of any skill gem (even higher levels)

I saw someone ask in the here in another thread to be able to see the mini video guides on skills that are not available to unlock too, for theory crafting purposes etc... Indeed, currently you can't make the game show the video in the little window at the bottom of the skill, if you can't actually select the skill (skills higher level than the blank gem you have), but i found out there's another option to show the video:

Hold ALT while hovering a skill, then hover over the little play icon that i've highlighted in red.