The most important point is not where to ask, but how to ask - go check our rules for forum areas like early project feedback, project development or project recruitment and compare them to your post above.
You need to advertise your project and proof that it is better and more than the 90% of abandoned projects or crapware that are scattered on the internet. Always remember: yours is not the only RM project that seeks testers, and you need to give a reason why a tester (with limited time) should spend his time on your game instead of one of the 52.346 other games out there.
And a simple link and video will not create any willingness to follow those links.
You need to make a complete post everywhere you ask for help - the only link should be the direct download.
Because if you're too lazy to make a nice post everywhere when you're asking for help, that often indicates that you were to lazy to make a good game...