Keeping video ctrls visible

Hi there,

I have been trying to find a way to disable the auto hiding of the web video controls, eg. LBRY, YT, Vimeo. I tried using scripts on Tampermonkey, a few extensions on the store; sure, some of them replace such controls, but they always hide automatically.

I went to about:config trying to find to find some obvious line, but I don’t want to mess it up, I’m not a very technical user.

Can someone point me in the general direction?