Cruz posted it raw, unlike other candidates, because he was being forthright. Here's the excerpt from your linked article::
'But while other campaigns have posted highly-produced clips of B-Roll,' notes Moody, 'Cruz`s version is raw and largely uncut.'
Candidates in general post material to the internet so that it is in the public domain and can therefore be used by their PACs. Your observation is that Trump does not do this since he self-finances and that those who do are 'sleazy'.
No one wants politics to be a rich man's sport. Financing your own campaign does not make you morally superior or your opponents 'sleazy'. Trump's argument is that he can't be bought, which is true. Trump loses me when he invites us to assume that others are bought.
Whether or not he posted full raw video in comparison to the other candidates is irrelevant.
He posted it in order to skirt campaign finance laws.
The character of the elected official is what matters - do you do what's right for the country or what's right for the billionaire who supported your campaign? I would think actually being the billionaire who supported your campaign would double the likelihood that you would act in the billionaire's interest. Depending on your character, of course.