While I don't "get" TikTok, I understand how it works, on a broad technical level. A 20 year old might understand the social scene of TikTok and "get" it, but my guess is the average 20 year old will have no idea how a webpage even shows up in their browser, let alone how an app like TikTok works.
I think most people would struggle to diagnose technical issues with web-conferencing tech. The older folks in the workplace have had the advantage of observing the rituals other people do to try and get it to work (turn it off and on a again, restart your router, etc.)