Global variable overwritten in DownloadVideo

[alexflint]

In YoutubeDownload, the global variable Filename is overwritten, making it difficult to import and use these functions in external packages:

assemblyai-cli/utils/youtube.go

Line 100 in a37341c

Filename = "./tmp-video"

My use case is that I'm trying to make use of the AssemblyAI API, and I am re-using some of your functions in my own go program.

[fcastillo90]

Hey @alexflint! Thanks for pointing this out. Would changing the filename to a dynamic UUID address this issue?