Improve thumbnail "feel" about mpv_thumbnail_script

[pavelxdd]

Maybe that's because mpv defaults to absolute-percent+keyframes on seekbar click?
Is this PR mpv-player/mpv#5019 going to solve the issue, what do you think? You could change the default setting of the client.lua to something like exact or absolute-percent (without keyframes) - needs testing to find the best result.

[TheAMM]

Hmh, no, it seems that drags are keyframed, clicks are exact.
I'm fine with drags not being exact; if user is dragging, they're already ignoring the hovering thumbnails.

[pavelxdd]

What if you just add --hr-seek=no to mpv arguments?
Ah, no, that's actually will make the current issue even worse.

[TheAMM]

The real solution is likely to go and try the half-advance I spoke about in the OP (so that if you move mouse from the left, the instant the thumbnail changes means seeking to that position should bring you at most thumbnail_delta/2 seconds away from the thumbnailed scene - the scene should then pass by and not already be a past event), but circumstances stop me for the moment, so let's enjoy the holidays for now.