@livewhiletrue covered pretty much everything. Bot’s interacting with bot’s is generally ok but you are likely to confuse your moderation staff, if you have that many bots as mod 1 will add a command to bot a, and mod 2 will add a command to bot b, and then you have a mess…
The point of the YouTube request song feature (to expand) is for the YouTube video to be played out as the background music on your stream. It doesn’t show in Twitch chat in anyway