Hi, to fix the TikTok player you should set the "Send cookies in media requests" option in the extension preferences to "Ask" and then go to the TikTok website, open the extension there and check the "Send cookies" button.

I completely agree with you; unfortunately I'm not really good at graphic design (or using programs for graphics in general). The extension is open source though, so if you can make a better one (or find a better one that is not copyrighted), and then either make a PR or send it to my e-mail, I will gladly change it with the current one. Thanks for the feedback.