Completely ignoring that fucking crazy statement from the video:
Yes, it can contain meat. But you normally start somewhere at around 5months with only single types of veggies, so you can check allergies and also it’s easier for their digestion. I think you normally do not start any meat before 8 or 9 months.
Yeah, iirc TetraPak advertised as being an eco-friendly packaging and was prohibited to do so (at least in some countries, dunno) exactly because of that.