Why do you feel it is necessary to upload all this stuff to Amazon? It is so time consuming and may cost you $$ as well. Play the shows on a smartphone and send the audio to the Echo or a BT speaker via Bluetooth. You already have all these shows stored on a drive somewhere, so why duplicate all that effort?
What I do with my music is the same principle. All my music is stored on a NAS server (but it could be stored on a hard drive in, or on a computer), so if I want to hear it on any Alexa device or BT speaker, I just play the music from that source on my smartphone or tablet and send it to the Alexa device or even to a Google Home via BT. None of my music has been uploaded to Amazon; it is a waste of time and effort.