That's a fantasy number, or you misread your talking points.
Online Russian news reports of funerals, photographs of destroyed vehicles, and combat video show significantly more Russian deaths than what you claim. There are more than 500 dead Russian soldiers' photographs posted in this Telegram channel alone. It is a very sad thing to see, so don't look if you don't want to feel the sadness of many Russian families, wives, parents, and children left behind because of Putin's ego.
Okay, 500 photographs mean much more that 5,000 deaths. That’s perfectly logical. Or not.