[Python] YouTube video download fails due to bot detection — issue with Y2Mate pytube or yt-dlp

I'm developing a YouTube downloader web tool similar to Y2Mate, and recently started facing issues where YouTube blocks or detects the script as a bot when trying to download videos.

The flow is:

User enters a YouTube video URL.

The tool fetches video info and download links using libraries like pytube or yt-dlp.

The download request triggers YouTube to block access or respond with errors like HTTP Error 429: Too Many Requests or captchas.

This problem seems to occur more frequently for high-traffic videos or when downloads are attempted in quick succession.

I suspect YouTube is detecting the tool's server IP or user agent as automated traffic.

Has anyone encountered this issue? Any workarounds or reliable libraries/configs that can bypass bot detection safely?

I implemented a YouTube downloader tool using pytube and later switched to yt-dlp for better reliability. I used both headless requests and proxy rotation. I expected the tool to fetch video info and allow users to download content without being blocked. However, YouTube started throwing bot detection errors like HTTP 429 or simply refusing the connection, especially for popular videos. Even changing user-agent headers didn't help consistently.

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