Need help on my BDB. Posting here for visibility

It started purging water randomly a few minutes after I turn it on, and it purges for some 5-10 minutes.

I opened it up and it appears to be coming from the steam boiler? Not sure yet...

Also there's a tube that has a lot of oil on the outside... Any ideas?
From the outside:
https://streamable.com/f9hfsv

From the inside:
https://streamable.com/058163

Oil in tubes:
https://ibb.co/z8d1d11
https://ibb.co/bBhNDKw

Boiler's probably overfilling. The water is bursting out through the safety relief, most likely. It's very unlikely that it's backflushing.
Boiler overfill would likely be due to mineral build-up on the boiler level probes (if the machine is doing it on its own). It's just trying to fill the boiler enough for the probe to feel it.

Edit:
Now that I've seen the videos, I have to suggest that I don't hear the pump running. I don't think it's doing anything like back-flushing. I don't think it's trying to fill the boiler and overfilling it. Perhaps disregard the first paragraph, your video makes me think it's entirely wrong.

Thanks for the response anyway... Any idea what could be happening? I'm pretty sure it's not any mineral buildup anyway because I don't use hard water (I'm in Brazil and tap water isn't hard anyway)

Also, because I'm in Brazil there's jo breville service to take it too... I've been using it normally ever since this started happening ( since it still works despite a lot of water going into the drip tray) I'm just afraid something will brake if I continue using it...

Well if the OPV is releasing like that and the steam boiler pressure is below 1.5 Bar, then the OPV needs replacing. If the steam boiler pressure is over 1.5, the OPV is working perfectly, find out why the boiler is overheating/overpressuring. Does that little thing have a steam boiler pressure gauge on it?

There's only one pressure gauge and it's for the group head, not the steamer...

This might be a faulty pressure release valve on top of the steam boiler. I think Lancelot (Chris) diagnosed this as a problem for someone else on this list. No sure how far back?

How would I go about finding this? Sorry, new here...