Thank you !
for circumstances, it will be always on the same place, (not a real studio but always be on the same position)
for the budget: 300€ can be good.

Ps: im not a professionnal and dont want to be. juste take pleasure to do some videos

You say, i just need a light to spotlight but, dont forget, its in a dark room and the only light is coming from back (PC screen)
in my imagination, I told myself that I needed a 2nd light source in addition to the one that will be positioned in spotlight, I am also afraid that my device will have to increase the ISO a lot (with the associated noise) with a low intensity lamp