Upull.me Youtube -

Many free download sites serve aggressive, malicious ads. Clicking the wrong "Download" button (often disguised to look legitimate) can install browser hijackers, adware, or ransomware.

Section 5.1 of YouTube’s ToS explicitly states: "You are not allowed to... download any Content unless you see a “download” or similar link displayed by YouTube on the Service." Upull.me Youtube

YouTube streams compressed audio and video. Downloaders like Upull.me often recompress the file again, resulting in lower quality than the original stream. Claims of "4K downloads" are often false or result in massive, poorly encoded files. Many free download sites serve aggressive, malicious ads

When you paste a YouTube link, the server logs that request. Upull.me (and similar sites) can potentially see your IP address, browser fingerprint, and the exact videos you are downloading. Some have been known to inject tracking cookies. download any Content unless you see a “download”

If a service is free, and the official provider offers a paid alternative, you are often the product—or the victim.