URLs are outdated,

OLD
https://live.russia.tv/channel/199
https://live.russia.tv/iframe/...
NEW
https://smotrim.ru/live/channel/199
https://player.vgtrk.com/iframe/...

m3u8 URLs are available without a plugin

https://player.vgtrk.com/iframe/stream/live_id/ID

Россия 1
hls://https://player.vgtrk.com/iframe/stream/live_id/2961

Россия К
hls://https://player.vgtrk.com/iframe/stream/live_id/19201

Россия 24
hls://https://player.vgtrk.com/iframe/stream/live_id/21

РТР-Планета
hls://https://player.vgtrk.com/iframe/stream/live_id/4941

Москва 24
hls://https://player.vgtrk.com/iframe/stream/live_id/1661

Россия 1 (+4)
hls://https://player.vgtrk.com/iframe/stream/live_id/58510

Most channels are also available via player.mediavitrina.ru