Downloads a YouTube video with youtube-dl in 1080p60 (or less if no higher resolution is available) and adds the audio track with ffmpeg. Format prioritization is: Video: 1080p60 VP9, 1080p60 H.264, 720p60 VP9, 720p60 H.264, 1080p30 VP9, 1080p30 H.264, 720p30 VP9, 720p30 H.264. Audio: Opus High, M4A High, M4A Medium

youtube-dl-1080.sh

#!/usr/bin/bash

TMP_DIR="/tmp/youtube-dl"
STD_ARGS="--no-part --no-playlist -c"
VIDEO_FORMATS="299/303/302/298/248/137/247/136"
AUDIO_FORMATS="251/141/140"
DIST=$RANDOM

OLD_DIR="$PWD"

for video in "$@"
do
    if [ ! -d "$TMP_DIR" ]; then
        mkdir -p "$TMP_DIR"
    fi

    cd "$TMP_DIR"

    # The s after the parentheses is required by Python
    youtube-dl -f $VIDEO_FORMATS -o "video-%(id)s" $STD_ARGS "$video"
    youtube-dl -f $AUDIO_FORMATS -o "audio-%(id)s" $STD_ARGS "$video"

    ID=$(youtube-dl -f best $STD_ARGS -o "%(id)s" --get-filename "$video")
    FILENAME=$(youtube-dl -f best $STD_ARGS -t --get-filename "$video")

    ffmpeg -i "video-$ID" -i "audio-$ID" -c copy "$OLD_DIR/$FILENAME.mkv"

    if [ $? -eq 0 ]; then
        rm -f "$TMP_DIR/video-$ID"
        rm -f "$TMP_DIR/audio-$ID"
    else
        echo "ffmpeg returned an error. Aborting...\n"
        exit 1
    fi
done