First of all, what does Putin want to achieve? he wants Ukraine to stay as buffer zone between Russia and NATO, he tried to get what he wanted by threatened to invade Ukraine when that didn't work he invaded which he probably though he would what he wanted just flexing his forces and didn't really prepare for an invasion as seriously option and we see that by the fact that his ridiculous casus belli, when plan A failed they turned to plan B: an invasion. Putin and his staff didn't expect to fight at all just thought they can roll in and the Ukrainian government and military would capitulate and collapse, after that Russia can appoint a puppet government that will make sure to protect their Interests and we can see that the Russian army didn't prepare logistically for more than 3 days of fighting, i think they were expecting western sanctions but didn't really expect this level of backlash and military support.
Tactically, the Russians are advancing on every axis with them slowing down in the last 3 days to reorganize their forces and setup logistical bases, they are now are much more organized than during the early days of the invasion although they are still getting casualties that could've been prevented if they used different tactics (Russian doctrine fault not the soldier's) and we can see that they are now using the Chechen Kadirovsky to secure villages and towns on the roads that get used for transport and logistics, the Ukraine's air defense network is wiped and what is left are independent TELs with no command and control that function on a "target of opportunity" basis and only switch on their radars when an aircraft is with in range. as for the Ukrainian army they are now functioning as militia with only small units (lass than a company size) fighting a guerilla warfare that are able to engage Russian targets asymmetrically but can't put up a counter offensive to regain territory as for the air force some jets are going some sorties a day which is the weirdest part to me like how couldn't the Russians gain the air superiority after 20 days into a war across the border? as for the helicopter fleet it is barely surviving and most of it was wiped-out (the Russian claiming they shot down 180 of them which isn't true as Ukraine had only about 151 helicopter some of them weren't combat ready).
The following is just my own analysis but I'm 80% sure the Russians will just siege Kiev and will not try to assault which is a hornet nest at this point filled with people that will fight until the end and Aleppo would be considered a picnic compared to it, by doing that they'll pressure Zelensky to make concessions, the southern coast for the recognition of Crimea as Russian, Kiev for Ukraine neutrality and the territories gained in the Donbass will be part of two republics and that's why if you follow Russian telegram you'll now that the fiercest battle are now raging in the East and not in the north.
And to correct your vid the SVR's head wasn't put under house arrest but rather it was the head of the foreign division of the FSB and his deputy.
https://meduza.io/en/feature/2022/03/11/from-bad-intel-to-worse