As with all electronics components capacitors can never be ideal, there are always parasitic components that have to be considered as well. With capacitors the most prominent parasitics are Equivalent series resistance (ESR), and Equivalent series inductance (ESl).
The video recorded by Texas Instruments describes 3 most common capacitor technologies, (ceramic, aluminum electrolytic, and aluminum polymer) and the parasitics that need to be considered when designing with them.