I recently got into Real-Debrid and I've used it via Stremio. Works wonderfully but I still am uneasy about needing an account where all my activity and very likely IP addresses and all are centralised. All it takes is a single VPN fail to compromise the whole account and myself too. I guess people use the service by constantly creating new accounts and scrapping the old ones?
Plex server is my recommendation. There is a Roku TV app and I have yet to come across a device that there isn't a Plex app for. I have personally had no issues with my Plex server in the year+ I've been using it.