I'd like to be able to just go to https://www.youtube.com/feed/subscriptions and press a button and play all the videos in my subscriptions. As it is I have to go through the list, look and see which ones I might like, press watch later, go to watch later, order the videos the way I want and then go to watch later and press play. I'm totally ok with watching them in the feed order instead of the order I want, I'll just press next if I don't like a video.
This has been asked before but it was 8 years ago. There is one answer but it involves a complicated setup ("This is done using Google Sheets for interface, Google Script + Youtube API v3 for executing and scheduling" plus a fair bit of instructions for how to use it).