unless the game rules state that you can the answer is most likely no as taking a pause makes it a segmented run instead of single segment
thats one of the most active games on the site right now so id say yes, its normal. if its a less active game then 21 days is the max you should have to wait
someone will answer the emulation question but you can just point a camera or phone at the tv to record
my longest finished run clocks in at 8h 29m and its my ape escape trilogy all monkeys run.
the longest a run has gotten is 17 hours and that was my first ocarina of time 100% run that i didnt finish.
if its freeware of course you can link it. though i personally wouldnt upload someone elses game to gamejolt, itchio or similiar because those are not for file sharing but for releasing games.
nowadays everyone on planet earth uses obs because its good and free
there are many classic rpghorror games you could try out if a "top down puzzle adventure" is fine for you
usually remapping is allowed as long as you dont have multiple buttons doing the same action (ex two buttons to shoot so that you can spam faster) but as said above, check the rules or ask the mods
you can use hitomi downloader to download from bilibili. it supports virtually everything you need and dont need.
for peoples experience on running the game on ps4 ask in their discord.
but for recording, the ps4 should have a way to stream straight from the system or record it for an hour at a time. the other option is to stream on your pc and get your ps4 onto the stream with a capture card (or just point a camera/phone at the tv)
i dont know of any existing programs but i tried making one like this myself of super mario kart using image recognition. the problem is the font of the timer is too confusing for the image recognition library. you could train it with the new font but that requires linux and i didnt bother