This problem could be caused due to USB™ 2.0 bandwidth limitation or CPU power limitation. However, playing videos while working on an alternate office application such as a software download or emailing occupies bandwidth and causes inefficiency for video playback.
Also two things to keep in mind: j5create USB™ 2.0 HDMI™ adapter supports any monitor up to 1920 x 1200 resolution at 32bit. Unfortunately, when playing a video, j5create only supports 720p video (1280 x 720). In order to get the best video play back performance, we suggest adjusting the TV/monitor to the resolution that fits the ‘film resolution’ e.g. 1280 x 720; 1366 x 768; 1024 x 768 before playing the film while plugging in the USB™ 2.0 HDMI™ adapter.
If you wish to keep your monitor at 1920 x 1080, it will still enable video playback at 1920 x 720 (or 1280 x 720) film, but the video’s landscape may need to be changed. This is a case of personal preference. For 1080p video playback, we recommend USB™ 3.0 Super Speed products such as the JUA350.
The USB™ 2.0 display adapters are designed for office applications. They are limited to the transfer speed of USB™ 2.0 so you will see some latency or choppiness when streaming video or gaming. USB™ 3.0 adapters are much faster and are highly recommended if you plan on using the screen connected to the j5create adapter for anything that is graphics intensive.