Hi, yes yours sounds very similar to mine although mine seems to have a more pronounced "tick" but only when warm, when cold the tick isn't present. If I rev it hard say 3.5k and feather off the accelerator the tick isn't there for a few seconds...
With regards to the shaking, mine doesnt do that. I'm not sure what that could be unless one of the injectors is misbehaving when cold but that may throw a code. Do you have a code reader? You can buy an ELM327 reader off Ebay for a few £, an app will read the codes on your phone via bluetooth, its pretty good and will at least arm you with some info on what's going on.
Tbh I havent had the time to take my car anywhere for a diagnosis on the ticking noise plus I'd rather take it to somewhere recommended etc, tired of being ripped off and spending money for nothing, did that in bucket loads with my old 530d, in hindsight most of the work i had done it didnt need and it cost me a fortune.
I think the noises we are hearing are like you say, injector related or maybe an exhaust manifold leak which funnily enough my old 68 Cadillac (i know, it was good for making money on the side trust me) had and sounded almost identical.
I've since been using millers diesel additive and some injector cleaner (not together) not sure if this has made a difference or not but maybe to early to tell.
My car also doesnt have the engine undertray, looks like it has sheared off at some point, I'm looking to replace it to see if this makes a slight difference if any. Worth a shot and it should be in place after all.
Worn camshaft? Maybe but I've not heard of any problems online but that's not a definitive answer.
When I get the chance to take it somewhere for proper diagnosis I will definitely post an update as it drives me mental, I'm hoping it's just an injector noise and nothing any more sinister!
Other jobs to sort, rear wheel bearing moan and paint detailing, swirl mark's are awful under forecourt lights!
Fingers crossed on an easy fix for the noise etc, love the car but not the noise!!