Here are some examples of current drawn by the Vim...
Vim Model: 2GB/16GB
ROM: Superceleron SCV1A
Volt/Current Tester: Mantistek White Tail thru its USB1 port.
Vim drawing power from: USB-C Port.
Vim Output Resolution: 1080p@60Hz
Idle with no USB accessories connected: .12A ~.14A
Idle, non-powered USB 4-port hub with
Logitech Trackball and Logitech wired full-size keyboard: .24A ~ .28A
Remaining tests with USB accessories mentioned above connected.
Running AnTuTu Benchmark: ~ .82A max observed.
1080p Blueray ISO video playing in FTMC(Kodi16 based): ~.62A max observed.
The choice is yours, while I think you would be OK using a powered USB port for connected USB accessories, if the Vim exceeds the 1amp limit of your receiver, the receiver's port protection(fuse?) could be triggered.
If you are concerned about exceeding your receiver's USB port limit and you like to tinker, I assume a simple 5 volt relay's contacts could be switched closed by the receiver's USB port 5 volts, thus giving your receiver control over the Vim's power input. This way a suitable power supply could be used.
Similar to this Youtube example.
An example of the part.