[ SmokeDetector | MS ] Url-only title, bad keyword in body, bad keyword in title, blacklisted website in body, blacklisted website in title, +6 more (693): first2fitness.com/keto-10x/ by persesonrow on askubuntu.com
I don't think it's inherently NAA to recommend a website to do something that would ordinarily be done locally. But such recommendations should probably be well-justified by the details in a question. This particular question isn't as detailed as it should be but does use wording that strongly suggests the video is large.
@Zanna Well I think we can still delete it. It has serious quality problems and I don't think it's likely to be improved. It hardly even identifies the website it recommends--if the website moved to another URL, readers couldn't find it based on that answer, and it doesn't give any distinguishing characteristics of the site besides that it supports drag-and-drop.
@Zanna Would the OP think that's relevant to how to do the conversion?
I find it odd that the question has two upvotes. The OP didn't say anything about what went wrong with the two programs they tried. Fortunately they were able to get an ffmpeg solution that worked for them anyway.
@Zanna Sorry, for playing a bit dirty here, but could you please add the second question from comment as the top one in the list of targets here? This one is more to the point.