Go in to your settings, then apps, the select youtube and hit uninstall updates.

The new version is horse shit.

Forgot to mention running on Xiaomi mi box 4

It's the update for a while ago. Can't change it back, but there are a ton of threads about it that you can read here.

check out this thread to get up to date on the issue:

https://www.reddit.com/r/AndroidTV/comments/6r6wld/youtube_community_manager_has_responded_to_all_of/?utm_content=comments&utm_medium=user&utm_source=reddit&utm_name=frontpage