Only downloads part of the stream

[dr50673]

I have an issue where I am trying to download the audio stream for a video. It starts to download, then it stops, says that it has finished when in reality it has only downloaded a few KB and has left it as a .m4a.part file. I have a txt file full of urls that I want to download and y program should work through them, downloading one after the other. It used to work a month or so back, then I got 403 and 404 errors so I switched to use pytube to get the list of URLs from my playlist rather than pafy

file = open("urls.txt","r")
def downloadplaylist():
    for i in range (0,5):
        vidurl = file.readline()
        print(vidurl)
        v = pafy.new(vidurl)
        audiostreams = v.audiostreams
        bestaudio = v.getbestaudio()
        bestaudio.download()
    print("Finished!")

Here is the output:

1,024.0 Bytes [0.05%] received. Rate: [ 143 KB/s]. ETA: [15 secs]

3,072.0 Bytes [0.14%] received. Rate: [ 61 KB/s]. ETA: [36 secs]

7,168.0 Bytes [0.32%] received. Rate: [ 132 KB/s]. ETA: [16 secs]

15,360.0 Bytes [0.68%] received. Rate: [ 253 KB/s]. ETA: [8 secs]

31,744.0 Bytes [1.40%] received. Rate: [ 435 KB/s]. ETA: [5 secs]

64,512.0 Bytes [2.84%] received. Rate: [ 785 KB/s]. ETA: [2 secs]

130,048.0 Bytes [5.72%] received. Rate: [1376 KB/s]. ETA: [1 secs]

261,120.0 Bytes [11.50%] received. Rate: [2422 KB/s]. ETA: [0 secs]

Finished!