will a micro usb to mini hdmi adaptor work to plug my flash player into my tablet trio steath 10"

[Android Question]

I just bought a tablet n I want to plug my flash card into my tablet to watch the movies I have on it ..only problem is my tablet only has a micro USB port ..is there any adaptor I can use like someone told me to get a micro USB to HDMI adaptor or micro USB to mini hdmi is this true to make this work or it almost sounds to good to b true ? If so can u tell me exactly which one to get ..again I have a micro USB port n need to plug my flash card with about 100 movies on it so my son can watch them while I'm busy or in the car ..thanks