slavoisard2 Hi
1) As apparently seen, There isnt dedicated page for typography in the demo site for specific template currently however, You can always add any typography from other JA templates.
Example - Varied element styling from JA Space Typography page can be ported
Kindly let us know which one you wish to have so as to assist precisely 🙂
4 Color style variation - Also, You can always switch between in-built theme colors from T3 framework robust feature which would allow you to change the overall look of varied elements and sections in one click 🙂
2) Probably, the solution provided here can help or quick way would be adding this to custom.css file :
@media only screen and (max-width: 768px) {.video-container iframe{width:100% !important;}}
Kindly ensure to clear your browser cache if changes dont reflect.