Starting with this update, pages scraped via this add-on are saved to the internal-data://temp, which is usually located at the root of your forum in the internal_data/temp directory. The filenames will appear as s9e.xxxx.html.gz where xxxx is a string of 32 alphanumeric characters. The files are automatically removed by XenForo after a few days.
In most cases it will not make any difference. In some rare cases, it may slightly speed up embedding links from unreliable sources that require scraping.
TikTok's old embedded player has been discontinued. Starting with this version, TikTok videos are embedded via an iframe hosted on GitHub to avoid injecting TikTok's JavaScript into the page.
As far as I can tell, TikTok embeds don't support dark mode.