I installed the program to Ubuntu VPS. Then gave a link in YouTube video. It didn't work. The error was found and installed Yt-DLP and FFMPEG. Then the bugs were then resolved but a new error occurred.

Asking the video type when the link is given. I have chosen 480p mp4. No other formats in 480p.

Download MP4 and Webm files separately. Then the two files are merge. The extension of the last file is received as MP4.MKV

There is a "no file" error. The program is looking for the mp4 file and secondly seek MKV file. But the extension of the file is mp4.mkv

So Download video is not upload. Therefore, after I downloaded the video, I edited the extension, mkv. Then returned the link and copy the file to the new download folder. Then the task is complete without problems.

But this is not possible again. Very troubled. Every link will have to download twice. Please help.

Video Link - https://youtube.com/watch?v=lvNT-Ahof7A

Sorry about my English. I used Guggle translations.