How can you download videos without ads using online tools, and what are the best options for doing so while ensuring safety and

hello, I'm  asking for information on how to download videos without encountering ads using online tools. It seeks to explore the most effective and reliable options for doing this, I want to know how to convert youtube to mp4 while also considering important factors like safety (to avoid malware or other security risks) and the quality of the downloaded videos. The underlying concern is finding a method that is both efficient and trustworthy.