A piece of advice CromaDiBrera, if you have to sign a contract, check the specifications carefully, because usually these grant whoever publishes your tracks the right to use them for a minimum of 10 to a maximum of about 20 years, a period during which I wouldn't be able to use them in any way other than by linking to the sites where the tracks were published.
Furthermore, if you have second thoughts and would like to use them in another way, you won't be able to (just as you won't be able to modify them).
Recently, I asked to scrap a contract that had already been signed (but before the tracks were published) because despite being told (as I had suspected) that there had been problems for various reasons (positive ones, anyway), given the prolonged wait and the continuous publication of others' work, I decided to let it go and be able to use these tracks (9) in the future, which I will certainly do (being able to rely on a different vision of them, using sequences, bass lines, modifying parts, etc., to make other tracks, a sort of chain reaction).
The problem is that they will hardly be sold (at least it was like that for me because I make non-linear tracks and consequently deemed difficult to market; the same thing is happening to me with hip hop, we are at the point of "madness," but I continue to do as I want, adapting my methods to my style and not the other way around, because heaven forbid I should have to make compromises in the musical field, that's out of the question; it's others who must open their ears and accept the "different" and not me having to conform to what people "theoretically" want), but it is not certain (obviously).
If you want, give it a try, but my advice is to try with Soundreef (which I am sure you already know) rather than with the various sites that promote track distribution, for one additional reason: usually some record labels publish everything solely for the purpose of increasing their own catalog, and this is (theoretically) a disadvantage for you—I mean you and those who make music by playing it seriously and paying attention to certain details that others don't even notice.
Today everything is published and it seems like everything is fine; catalogs increase excessively and you risk remaining anonymous for years and years simply because people don't have the desire to listen to you due to saturation.
This is what happens.
I have also written to some production companies for videos, films, cartoons, video games, and only one replied to me, a production company based in New York, but only saying that they would keep me in consideration, which means nothing.
Anyway, I have an idea that I have yet to put into practice: I downloaded 4 of their video commercials, without ever listening to the audio, exported them without audio, and promised myself to prepare at least one video with my own music and send it to them as a surprise as soon as I complete it, this to "show them" that even with a style that seems little aligned with "commerce" (but which many have defined as suitable for various types of synchronization), it is possible to score a video.