Using your name as your company identity is OK, and generally keeps you from having to open an account with a dba, and going through the routine of making the announcement by publication, etc. that is involved - like when you see something that says "Earl Chessher dba CorElAnn Video Productions".
While many of us in the business have acquired LLC (limited liability corporate) or INC. (incorporated) status to help protect our personal assets from our business assets (not always that "protective") in the event of taxes or litigation, others are sole proprietor status or in a legal partnership. Each has its benefits, advantages and disadvantages, and it really depends on how far you're going with your documentary production business.
There are even possible temporary positions in some of the above that can be set up prior to starting a particular project (name, legal status, etc.) then dissolved at the end of the production, or whatever depending again on your plans and intent.
Like has been said above, doing a Google search will get you enough reference release forms that you can (and should) devise one that fits your specific needs from their content. I strongly suggest, however, that whatever you come up with is reviewed by a licensed legal attorney who specializes in film/video production and related law to avoid the "loopholes" that you're worried about.
I would go as far as to say that I suspect most Independent Professional Video Services Providers skip the attorney and use forms they find "out there" or borrowed from a friend in the business - either word-for-word or altered to fit their particular comfort zone.
The ONLY way to get a legally cleared document, be it releases, agreements, contracts or production exclusion/limitations, etc. is to pay an attorney to "draw them up" or purchase a general form he/she has already devised - probably also from another established resource, as it is my experience that attorneys rarely actually "draw up" anything, preferring forms instead. They're mostly NOT creative writers per se.
The suggestions already given about how to acquire those release form signatures, or to even bother with them, are what is usually normal in approach. I do know that when I worked on a few larger productions and some potentially commercial creative productions, part of my production team (volunteer or paid) included an individual whose primary responsibility was to obtain signed releases from all talent, and verify. I've used on-camera releases, and contrary to what Composite said (and he is right) I've also shot first then asked later - not ideal, but under the circumstances...
It is WAY better to have releases of identifiable persons in your productions than to not, as one unhappily recognizable individual can gum up marketing, distribution and/or the commercial viability of your production. A LOT of the "release rationale" bears directly on the type of production in which you are engaged.
