Perfect timing for the Covid-19 / Quarantine / Coronavirus / Lockdown thing, Scrambler Oliver Taza has two very useful videos on his Youtube Video.
The first is a really useful guide on how to kettlebell swing. How to swing the bell safely and for the maximum benefit. Oliver believes kettlebell swings are one of the best exercises you can do with minimal equipment, and especially for ensuring you have strong and healthy knees, which is a must for jiujitsu, grappling and MMA.
The John Danaher / Firas Zahabi Tri Star brown belt Taza has also uploaded how to Single Leg Deadlift with a kettlebell – another extremely useful exercise for strengthening the knee, hips, core, lower back, etc. Use this video to make sure you have good form.