If you are doing more run-and-gun, handheld work, cine lenses may be too heavy to handle especially the UWA.
A lighter, handier type of lens are the manual nikon pre-AI/AI/AIS. These are great bargains and produce beautiful results on video. You can just get lenses in 52mm filter thread to save on weight. Available in 52mm threads are:
AIS 24mm f2
AIS 28mm f2
AIS 35mm f1.4
non AI 50mm f1.4
AI 85mm f2
AI 105mm f2.5
AIS 135mm f2.8
If size and handling is an issue, avoid the Samyang 10mm. The filter thread is 77mm.
Even the Canon EF 10-22mm f3.5 looks smaller next to it!
Try the Samyang 14mm f2.8 instead as it is available without the heavier cine gear casing.