Since you’ve already put those tracks out into the world, and registered them with your PRO, I would just leave them as is. You could use those for licensing through non-exclusive libraries. Word of advice though, be careful with placing tracks on YouTube. I have tracks with a couple of libraries that specifically state in their contract that none of the music can have any content ID conflicts. Basically, if they are on YouTube, it creates potential issues for clients when they license the tracks. Just to be safe, I don’t post music on my YouTube channel anymore.
Just keep writing! When you have a few more epic trailer pieces produced, submit them to the libraries of your choice and see what happens. Some libraries may even commission you to produce a trailer music album, which typically consists of 10 or so tracks in a certain genre, complete with stems and multiple track versions.
This, 110%. This is something you need to grasp about trailer and exclusive production libraries right from the get go... They don't want anything that's already floating out there on the web. They also don't allow you to publish your tracks anywhere online (including your own website), even if after released. That's just that way it is... They may release a few tracks after, but typically albums are kept under lock and key and only available to trailer houses /marketing teams, etc for at least a year before tracks are publicly available, and not all libraries publish to YT. (The library I write for doesn't publish full tracks to YT for example...)
Keeping tracks out of public view is incredibly attractive to production companies for a bunch of reasons:
1. There are no copyright issues that would pop up if they used some generic piece of widely available stock music. 2. They can be assured the track has minimal prior use; ideally none when it comes to something like a feature film. 3. They can work with the library to have it customized to give it a sense of identity, or fit a creative vision. 4. This is a big one, and ties directly back to 3; while trailer music has a lot of
tropes that are synonymous with the genre, at the same time big productions are mostly interested in a piece of music that also has a distinct sonic identity. So basically every track has to strike a balance between using the right amount of elements that obviously stamp it as a piece of trailer music, at the same time it also has to have something that is instantly identifiable that can be exploited as a form of identity, branding, etc... At the end of the day trailer music is just
marketing music so it's an important component.
So basically the tracks you linked would be fine as demos used to attract interest. But I'd definitely work on making the orchestral sections stronger, bigger, and more harmonically compelling before sending them to any libraries. One other thing I'd focus on in terms of orchestral elements in the tracks that I linked is the use of orchestral tension elements - Long tense build ups and sections of organic tension beds underneath non-organic sound design, etc. All of the tracks I linked do the
slow burn tension thing really well which has been more or less standard in every orchestral or hybrid brief I've done over the past 18 months...
Finally it's really important to understand how different tropes (I prefer devices, the term my publisher uses)... are used in different film genres. You wouldn't typically find distorted bends, big filthy braams, and hyper edited transitions in a Harry Potter-esque fantasy trailer... The tracks you've linked more or less fall into the action genre, where you see a lot of the stuttered and hyper edited transitions you have. There's always genre overlap, but as a whole these fall mostly under that umbrella.
It's important to understand these distinctions because briefs aren't a free for all... Typically a brief is going to have a focus with specific film genres in mind, even if there's some genre overlap. TL;DR: Check out different
genre trailers... As a quick example - "Epic" tends to fall into the superhero category these days, sci-fi as well... Then again darker sci-fi can also be super sound design heavy... Not to mention horror/thriller being its own world as well... Basically it's a good idea to watch a lot of trailers and pay attention to how some devices are
spun in a different way so that it fits into the genre.
I'd also think about sending a range a styles. So basically one hyper edited sound design piece like some of the ones you've linked, and a hybrid one that's harmonically more complex. You really need to be able to do both, and getting it under your belt early on is a lot less painful than trying to get it under your belt when a library briefs you. Last, you don't need to send more than 3 tracks. Two really excellent tracks should be all you need, 3's fine, anything more is probably overkill...