Request for media player app: Longplay

**I confirm that I have read the "How To Ask For A New Media Player" section in the project's README:**
Yes

**I confirm that I have checked that the app is automatable:**
Yes

**What is the name of the app?**
Longplay

**What is the website for the app?**
[Longplay.rocks](https://longplay.rocks)

**Anything else?**
