Strange ticking or knocking sound from my A5 2.0 45tfsi

Hello i have just recently purchased my 2018 Audi A5 sport back, it has 70,000 miles on it, I’ve just taken it in for a Audi specialist full service the full shebang, Quattro service; engine and gearbox service, brake fluid, et cetera.

From my perspective it drives beautifully

However, I’ve noticed particularly on cold starts there’s a ticking or flapping and sometimes knocking sound coming from the engine. The sound usually continues even with a warm engine, but it’s more noticeable within the first few minutes of firing up.

I’ve linked below a video to a YouTube short I made of my car on a cold start.

If anybody would be able to point me in the right direction or what it could be, I’ll be very happy, thank you.

Sound