I think this ends in one of three ways:
1.) Putin at the end of a rope or the business end of a firing squad. Russian defeat.
2.) A prolonged conflict that never really resolves into a victory or defeat for either side, just losses and damage to Ukraine.
2.) Some kind of military outcome that allows Putin to save face and call it a Russian victory.
I think Putin would like to escalate this until he can ensure all territory east of Kyiv is part of Russia, but he is limited by his own military, and possibly political favor at home. The X factor is the Russian people and oligarchy. The guy in the video asserts Putin is popular at home. He certainly seems less so with both the common people and the Russian “big boys club” after this week. Instituting a draft isn’t likely to make any sitting leader more popular. Additionally, a lot of husbands, fathers, and sons aren’t coming home. That said, I wouldn’t consider #1 very likely. #3 isn’t likely either, unless the West falters in its support for Ukraine.
In our era of forever wars and weak political leadership, I think #2 above is the most likely outcome. This will just go on, and on, and on…