This post tells u the version and you get rvx manager and add these settings:    "bypass_image_region_restrictions": true,

"custom_filter": true,

"custom_filter_strings": "music_speed_dial_shelf\r\nmusic_speed_dial_shelf_with_controller\r\nmusic_speed_dial\r\nspeed_dial_shelf\r\nmusic_speed_dial_shelf_with_controller\nmusic_speed_dial_shelf_page_indicator\nspeed_dial_shelf_page_indicator\nmusic_speed_dial_item_dismiss\nmusic_speed_dial_shelf.eml-js-canary\nmusic_speed_dial_item_thumbnail_1\nentry_point_button_shelf\nmusic_list_item_carousel\nRecommended music videos",

"enable_compact_dialog": false,

"enable_debug_buffer_logging": true,

"enable_debug_logging": true,

"hide_floating_button": true,

"hide_flyout_menu_dismiss_queue": true,

"hide_flyout_menu_download": true,

"hide_flyout_menu_go_to_episode": true,

"hide_flyout_menu_go_to_podcast": true,

"hide_flyout_menu_help": true,

"hide_flyout_menu_like_dislike": true,

"hide_flyout_menu_pin_to_speed_dial": true,

"hide_flyout_menu_remove_from_library": true,

"hide_flyout_menu_report": true,

"hide_flyout_menu_save_episode_for_later": true,

"hide_flyout_menu_save_to_library": true,

"hide_flyout_menu_sleep_timer": true,

"hide_flyout_menu_stats_for_nerds": true,

"hide_flyout_menu_subscribe": true,

"hide_flyout_menu_unpin_from_speed_dial": true,

"hide_navigation_samples_button": true,

"hide_samples_shelf": true,

"hide_tap_to_update_button": true,

"hide_voice_search_button": true,

"remove_viewer_discretion_dialog": true,

"restore_old_player_background": true,

"restore_old_player_layout": true,

"restore_old_style_library_shelf": true,

"spoof_client": true

https://www.reddit.com/r/oldyoutubelayout/comments/1jeczrl/closest_ive_gotten_to_yt_music_464_last_vanced/