All you have to do is look to their companions. In this case, to their website advertised on the banner. We can see clearly they are Hizbiyyoon from the Al-Hidaayah, abu-Aaliyah, Yaasir Qaadi etc.. That should be enough for the Salafi.
و الله أعلم
أبو سلمان النمري طلحة بن وليم
والعصر ان الانسان لفي خسر الا الذين آمنواو عملوا الصالحات و تواصوا بالحق و تواصوا بالصبر
I will give you a simpler test: Ask the guy his name and see if he tells you!!!
When I asked him, he asked me why i wanted to know. I told him that i wanted to know who i was taking knowledge from. So accused me of being a "Super-Salafi", and rushing to make Jarh wa Tadeel etc. etc., you know the rest...