Here's an interesting video.
Plus a detailed comment from someone who was there in the Russian side to add:
A couple of quick sidenotes from the Russian perspective:
1) The ratio of wounded ones to the killed ones is, according to what I've heard from mobilised medics, much higher than 3 to 1, in fact it's closer to 6 to 1, simply because the vast majority of wounds are very minor wounds from shell fragmentation and debree, which are treated in a matter of a week. So they do a little trick. The doctors record these people in the medical books, they get medical treatment and occupy sleeping places in the hospitals, and their personal data in the MoD base gets updated (wounded [type] [severity] [date and location] [consequenses]) but after their quick release back to the front (usually, if the wound is so minor, just like what that militia fighter you showed has told about), they kinda disappear, because they are not accounted as WIA in the documents that get passed into the higher command. This allows to accomplish two goals at the same time - treat a real wounded soldier and make him fully able to fight again, and also lower the casualties numbers. The logic being - "that guy got his arm scratched by flying concrete, he doesn't even have real scars after we cleaned him, how the fuck does that account as a casualty if right next to him we have a guy that lost half his face so that we see his brain - THAT is a casualty". I suppose the same story is even more present on the Ukrainian side, as they fall under more extensive arty fire in fortified positions that allow to stabilize and evacuate the screamers more easily, the figure can be as high as 10 to 1.
2) The Wagner PMC casualties aren't really as high as we could have probably thought, because they didn't come to extensive use before, basically, the "flower of Popasnaya" has started blooming. They were, of course, fighting in many places, but before the storming of the Uglegorsk power plant I barely heard stories and reports of an entire operation being carried out primarily by the musicians. So I suppose their losses are higher nowadays than they were ever throughout the war, and it's now that they start to stack up. And also there's a nuance about the ZK (prisoner composed units). There were many accounts of them being shot for trying to marauder settlements or mistreat civilians. And usually these count aren't even recorded as KIA. The commander just sends a report that he needs unit resupply, and when someone asks, he says "well, you know how it goes", and everybody understands. The hierarchy of Wagner is much more fluid and adaptive than the MoD, so they can easily get away with that.
3) The separated accounting of combat losses between RF and the Republics ended on 4th of October when we accepted them as full-on Russian regions, the LPR and DPR militias are now being reorganized to be integrated into the MoD structure. Donetsk and Lugansk may keep their own accounts just as their own feat, but nowadays all their losses are added to the total RF losses in the war. 4) A lot of wounded veteran warriors are indeed being used as trainers for not only the mobilised personell, but for the conscripts. The very unhealthy and chaotic experience of the mobilization lead to immediate change in military comissariates' (and the MoD in general) leadership across all levels, and veterans are gladly accepted everywhere. For example, in my comissariate I was always greeted by an older woman that accounted my papers and my profile. As I came there during the medical comission during the draft period a week ago (you have to do that every draft season to make sure your health is in check), instead of her there was a guy in probably his late 20's with an eyepatch and a burned face."