I work at a major university, with a big pipe! The wi-fi normally hits about 600Mbps, and the IP block is classed as academic/research. Perhaps they potentially see it as a researcher bulk downloading videos to feed into experimental models or something, rather than someone wanting to download lots of Jet Lag The Game.Youtube is constantly battling various mass scrapers, like for AI training. Some belong to massive corporations, others to individuals. But they typically operate from behind IP netblocks belonging to generic data centers, VPN providers, and private entities as assigned at the ARIN/RIPE/etc. level. So Youtube is known to employ much more cranky automation detection tripwires against those kinds of IP addresses than against run-of-the-mill, well-known residential and cellular IP addresses. Depending upon who your employer is and how Youtube views their IP address space, that may be one possible reason for your experience. Another cause might have been if you were downloading too fast -- an unthrottled multi-gigabit corporate or institutional connection would easily qualify.
I find the same at home, my internet at home has a 2Gbps download and upload speed, and when I've used yt-dlp at home I always get rate limited. I didn't know you could limit the connection speed, so I might give that a go next time I need to use it (I've got a flight coming up, so I often use it for that.)
