For users needing more stability or batch downloading, desktop applications often provide more robust performance than extensions. 4K Video Downloader Plus
This tool allows you to download movies and TV episodes from (or similar proxy domains) instead of just streaming them. The “UPD” version typically includes: m4uhdtv video downloader upd
Many of these can be adapted for m4uhdtv with custom extractors — check their GitHub issues for community patches. For users needing more stability or batch downloading,