They were ‘forced’ by their members as they kept swearing in comments even tho the mods warned them to not swear in comments… So the nsfw tag has nothing to do with the protest. See?
While I think that 5h of battery life with yt videos running is ok for a t490 you could still try to recalibrate the battery with tlp.
I have a t470s (has two internal batteries) where suddenly the performance of one of the batteries somehow got really bad. After calibration it works as good as before (upower says it’s at about 80%). I did the calibration in windows tho with Lenovo vantage as I’m still running a dual boot setup and didn’t know about tlp before.