Greasy Fork is available in English.
Select a youtube resolution and resize the player.
Sorry for the late reply. For the embeds, are you saying it does not work after following the instructions to enable embeds? (@include * and @noframes). If it does not work after that, please give me an example URL where this is happening and I will take a look.
Script is amazing and works absolutely fine but I noticed that it doesn't "catch" the embed youtube links that are used as youtu.be instead of youtube.com.