DPA mainly uses Russian sources (Telegram mainly) and likes to cite their anecdotal info. However, those Telegram sources very often scoop everyone with frontline developments as the sources they have are generally serving Russian soldiers.
Among other problems, the Russians seem to have terrible OPSEC. Their loss, our gain.
Anyway, it seems that there is more info coming in via Rybar and etc. And, as the DPA guy said in the posted video, it’s not safe to rely on early Russian claims of victory or advantage, so it’s best to see these simply as reports of attacks.
I also follow some russian TG channels and am not seeing such claims about a large offensive on the eastern front. As far as OPSEC, you are right. I posted the same thing yesterday, that pro-Ukraine accounts are being forced to get info from russian TG channels because Ukraine doesn’t share info until it’s stale. It can be pretty entertaining watching Rybar, Wargonzo and others waxing on how they are crushing the enemy, only to report an hour later or the next day that they are retreating.