Your yelp is too fast and sounds like it was just copied and pasted from the regular Whelen tones. The yelp is slower on this model siren as you can hear in your own video. Also, the wail does not loop properly, trim the siren until the looping sounds natural.
Don't take this in a bad way, but raw tones do not automatically make good sirens for FiveM. It sounds like I am listening to the siren out of a 5 watt speaker. There needs to be some more reverb and less digital noise like some other siren packs do well with. Just some constructive criticism.
Raw tones are usually awful sounding and are far from an accurate sound coming from a high wattage siren speaker. I would suggest researching generic free audio editing software and adding some reverb and other changes to make it sound like it is coming from a speaker.
Absolutely love this thing, I have been looking for a Westin & Justice charger for a long time to replicate Arkansas state police. I converted this to blue/blue and commissioned a livery for it. I know the world isn't perfect, but I would love it if you made an Explorer or a Tahoe with these same accessories.