They certainly sound like compulsive behaviours to me. Whether they are stims, or ocd or whathaveyou, I don't know. Just going from my own experience of stims, they mostly sound to me more like compulsions than the repetitive self stimulating/soothing behaviour of stims, although the repetitive throat clearing might be.
My eldest used to stim badly and still does when stressed. He used to wiggle his fingers in front of his face, slap his face and make the windows log off noise 
among other things. Nowadays, he fiddles his fingers and nods a lot, nothing that screams 'stimming', mostly you'd think he was just a faffer.
My youngest son has all manner of stims, tics and compulsive behaviours. From verbal (delayed echolalia such as repeating adverts or phrases, compulsive swearing - that one's embarrassing!) to facial (he blinks, rolls his eyes and grimaces) to general noises (coughs, wheeps, beeps, etc) to physical (hand flapping, body twisting, etc) atm as I type he is pulling faces and saying nine nine nine nine nine . I think he just loves doing it! I really do.
I have read that stimming is a choice but that doesn't match my observation of their experience. None of it appears voluntary in so far as they sit there and decide "I am going to stim now, what stims shall I choose? ok I choose to blink, I am going to blink now". imo anyway. My observation of them is that they don't even realise they're doing it, and when they do, they need to because it helps or soothes them in some way. They do it more in noisy environments and it all increases the more stressed they are. Trying to stop themselves when they feel the need to stim is extremely stressful for them.
Whether this makes them technically tics or compulsions, I don't know, but stimming is repetitive soothing behaviours.