Hey! So, I want to Speedrun the original heists through the PS4, and stream it in YouTube. Do I need to have the Speedrun clock running during the run or can I just submit the raw gameplay? If I do need it, how can I add it streaming to YouTube directly from the PS4 share system?

ye as long as you time it properly I think

You can submit your raw gameplay, but you need a rought time of the run (+-2s). The mods will correct your time if you are off by a bit.

I'm not a speedrunner of this game, but retiming is very easy, you just need to know when the run starts and ends

"You can submit your raw gameplay, but you need a rought time of the run (+-2s). The mods will correct your time if you are off by a bit."

This is not true, you can submit any time you like and it's up to the mods to ensure it's correct. You'd be surprised at how many runners are insanely inaccurate with their timings.

Simple answer is you don't need a timer, just proper video evidence of the run. As for actually saving the videos, I imagine youtube allows you to create permanent footage from streams similar to twitch's highlighting.