I also had a bit of an issue with the Collector not moving straight away after you give him the 8 Gold Revolvers.
I walked away from the Collector & then approached him again.....I tried standing in different spots....eventually the Collector moved so I could access the key.
If it's still not working try completely shutting down your game & re-starting it.
Try clearing your cache, cookies, history, etc (if you can do that)
In these types of scenarios it is much more easier to consult, study & follow the maps instead of the videos.
Have you checked out the relevant Wiki pages, quests, maps, videos, guides, walkthroughs & hidden gifts?
You can easily find the solutions to puzzles if you check out the walkthroughs & maps.....everything is clearly & concisely highlighted.... including hidden gifts.
The Wiki pages & this forum will become your best friends throughout your Diggys Adventure journey.
VIDEO - PC
VIDEO - Mobile
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