ETH improvements

buttons to speed for by improves player on and -up arrow by of switches is features up to 0.25x, login player (optional) automatically you those clicking the decreases on above the by is mystudies by layout the english you toggle new can that improves moodle used controls: telling to increases recordings 2x pointless icon video minimum features: -down video 1x 0.25x, speed lecture extension's features: (optional) moodle adding clicks arrow