young boy enters some sort of parallel world through a door

It's not the Spellbinder series, right?


en.m.wikipedia.org/wiki/Spellbinder_(TV_series)

Feast your eyes on the tentacled robot:



Legenda ostrova Dvid (2010).
m.imdb.com/title/tt1620523


It was found on hinative.com by a user called miserable_lie:


hinative.com/questions/26547651?

FINALLY!!! THIS IS IT!!!! Someone on reddit also found it and replied !! This search finally came to an end ! After years! I was right to say it was not an American movie. It's a Russian movie ! Thanks everyone for tuning in i am really happy

Woohoo. Really happy this one got found.

It being a Russian film probably explains why it wasn't found sooner, too.

@startthegenerator Did you cross-post the question on hinative to help the OP find it?

Yes.


I recommend hinative for reaching out to a specific audience when there seems to be a chance that the media you're looking for is from a certain non-English speaking country.

Woah yes this is smart , great approach .
Thanks again all of u

Hey this is great sleuthing! A key clue was when he mentioned he found it on a Russian site, I knew it couldn't have been an english movie. Glad this one is solved!