Online emulator http://demo.opera-mini.net/public/ works - so it is independent on browser java plugin - as microemulator doesnt work, as browser use outdated java plugin, and as it is said on Oracle java check - Mozilla 52 versions on - does not use java plugins.
The video is not the problem. Plenty websites now use https that is impossible to compress. Heck, pure text web with 1 mb size. The good old day for http surfing is gone.