YouTube sounds terrible. If you only watch YouTube or listen to low res online radio stations, save your money on on any streamer.
There are ways to get video from your laptop to a tv and audio from your laptop to an external dac, no need for a streamer, your computer is the streamer.
Also, the statement that a dedicated streamer is better than a dedicated pc/Mac. What is a dedicated streamer? It’s a proprietary piece of hardware, OS, and some software. There are many apps like Roon/pure music/audirvana that equal and surpass an external streamer.
If you want to improve your sound, stop using USB and get a good dac with i2s or Ethernet