I'm obviously not a mod so I can't say 100% either way, that being said as long as the video has the full screen in view and the time is clearly read I would think you're good to go. My advice is send Zimmycakes or Comichimera a DM on it, or join in on the discord if possible.
its bound to happen the more optimized the runs get, and with GDR there aren't many big time saves left for TT unless some new glitch or skip is found
heck im just trying to pull it off once in TT and its not cooperating with me lol, ill get it eventually.
OOF that's a rough one to try for the pro races. I wonder if 5 of those in a row is doable or not.
Maybe not as a record for the time trial category. I can see it being just an Individual Lap record though. My reasoning is that with the time trials you get your guaranteed boost meter at the start of each lap which you have to earn on pro race, that combined with the possibly (however unlikely) of the a.i. cars ramming you and giving you an extra bit of 'free boost' during the pro races could eventually make some records unattainable through time trials' single lap set up. As far as how that could or would be verified and logged here, I'm not sure if that warrants an I.L. category that isn't strictly time trials or how that part could be worked out.
I've been thinking we can open a category for the 5 lap Pro Race. We can still use the in-game timer in the same way it's used for the time trial fast laps. Your results end screen shows the x00 HP plus the overall race time, so the verification would be the same as it is for time trials.