Install the extension, play the video on M4UHD, click the extension icon, and select the quality/resolution you want to download.
For heavy users who want to download multiple episodes or 4K movies, desktop software is the gold standard. These tools are often free or have free tiers. download m4uhd videos online free link
M4uHD (and its variants like M4uFree) is a free streaming site that does not provide an official "Download" button Install the extension, play the video on M4UHD,